Qur'an  5:46/47 and 43:63; 

"And in their (earlier prophets) footsteps,  
We sent Jesus the son of Mary,  
confirming the Taurat (the Torah),  
that had come before him:  
We sent him the Injeel (the Gospel),  
therein was Guidance and Light.  
And confirmation of the Taurat ( the Torah),  
that had come before him:  
a Guidance and an Admonition to those who fear Allah."  

"Let the People of the Injeel (the Gospel),   
judge by what Allah had revealed therein.  
If any do fail to judge by what Allah had revealed,  
they are those who rebel." 

"When Jesus came with Clear Signs, he said: 
'Now I have come to you with wisdom,  
in order to make clear to you some of the (points) 
on which you dispute*; therefore fear Allah and obey me**. 
For Allah is my God and your God***;  
so worship you Him****: this is a straight way." 
  * Mark 6:2; ** John 5:24; *** John 20:17; ****Matthew 6:9 ff. 


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After his stay in a wilderness for forty days, Jesus entered Galilee preaching the 'Gospel of God'. He admonished the people by saying: "repent and believe in the Gospel". Mark 1:14/15.  That was the beginning of his ministry. Jesus traveled throughout Galilee, proclaiming the Gospel in the various synagogues and healing. Matthew 4:23.  

While traveling in the region, Jesus came to Nazareth where he had been brought up as a Jew. Following the Jewish custom, Jesus entered a synagogue on the Sabbath day. Here, he was given a Scroll of the prophet Isaiah to read. Jesus unrolled the Scroll and according to apostle Luke, read the following text from Isaiah chapter 61, that which spoke of him. The text clearly indicates the God's purpose for anointing. It was to preach the Gospel to the poor and afflicted.  
Jesus is called "Christ Jesus", because God had anointed him. 

     "The Spirit of the Lord is upon me, because he anointed me  
         to preach the Gospel to the afflicted (poor)..."  Luke 4:18 

During the ministry of Jesus - long before the four Gospels that we read in The New Testament were written - his disciples following the footsteps of their beloved Teacher: "began going about among the villages, preaching the Gospel..." (Luke 9:6). This was the 'Gospel of God' that Jesus had taught them. 

Apostle Peter had rightly questioned in his first Epistle: "What will be the outcome for those who do not obey the 'Gospel of God'?" 4:17. 

When the apostle Paul wrote in his letter to the Galatians; not to be mislead by the preaching that are contrary to that which they had already received, he was referring to the 'Gospel of God' that Jesus himself  had taught to his disciples and the followers. The four Gospels of the New Testament were written nearly 30 to 35 years after the above letter of Paul was addressed to the Galatians. 
 

THE SERMON ON THE MOUNT 

Seeing a great assembly of his followers, Jesus went up on a mountain. He opened his mouth and began teaching many things. The details of his teachings are recorded by apostle Matthew in chapters 5 to 7. When Jesus had finished his Sermon, the multitudes were amazed at his teachings. Jesus was not speaking like an ordinary scribe but as the one that had come to them with a Divine authority. Mt. 7:29. 

Some of the noteworthy passages from that historical Sermon:  
  
             Whosoever therefore annuls (discards) one of the 
             least of these Commandments, and so teaches others,  
             he shall be called least in the kingdom of heaven:  
              but whosoever keeps and teaches them, 
             he shall be called great in the kingdom of heaven. Mt. 5:19 

            After this manner therefore pray you: Our Father 
            which art in heaven, Hallowed be thy name. 
            Thy kingdom come. Thy will be done in earth,  
            as it is in heaven. Give us this day our daily bread. 
           And forgive us our debts, as we forgive our debtors. 
           And lead us not into temptation, but deliver us 
           from evil: For thine is the kingdom, and the 
           power, and the glory, for ever. Amen.   Mt. 6:9/13 

           But you, when you fast, anoint your head, 
           and wash your face; so that you may not be seen fasting  
           by men, but by your Father who is in secret; and your Father, 
           who sees in secret, will reward you openly.  Mt. 6:17/18 

         Not every one that says to me, Lord, Lord, 
         shall enter into the kingdom of heaven; but he 
         that does the will of my Father who is in heaven. 
        Many will say to me in that day, Lord, Lord, 
        have we not prophesied in your name? and in your 
        name have cast out devils? and in your name done 
        many wonderful works? And then I will declare to them,  
        I never knew you: depart from me, you that work iniquity.   
                                                                         Mt. 7:21/23 
       Therefore whosoever hears these sayings of 
       mine, and acts upon them, may be compared to a 
       wise man, which built his house upon a rock: 
       And the rain descended, and the floods came, 
       and the winds blew, and beat upon that house; 
       and it fell not: for it was founded upon a rock. 
       And every one that hears these sayings of 
       mine, and acts not upon them, will be like 
       a foolish man, which built his house upon the sand: 
      And the rain descended, and the floods came, 
      and the winds blew, and beat upon that house; 
      and it fell: and great was the fall of it.  Mt. 7:24/27 
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JESUS ACCOMPLISHED THE ENTRUSTED WORK 

Besides, the Sermon on the Mount, the righteous Jesus did during his short ministry of three years, "teach his disciples" whatever the God Commanded him to Declare. Jesus was a faithful "Messenger" of the One that had sent him. These "teachings" and "messages" from God were the "Good News of God" (Injeel). Declaring this was the work entrusted to him by the God, whom he often called "Father" in a metaphorical sense. Jesus also said; the same God was "our" Father. (John 20:17). In other words; the Creator of us (The God), is as much a Father of us all today (in a figurative expression), as He was of Jesus during his ministry. Since this terminology was abused, the Qur'an prohibits its use.  

Jesus never declared; he was a "Begotten" Son of God; God the Son; God the Creator; an associate (partner) of God; a physical manifestation or an incarnation of God the Creator. The term "Begotten Son" does not appear in the Greek text of John's Gospel. Please click   HERE   and read the answer to FAQ No. 4, for further details. The Doctrine of Trinity, as taught by the Christian Church today, was not taught by Christ or by any of the prophets that came before or after Jesus. 
 

After Jesus had conveyed the "Good News" (God's Message - The Gospel) , he saw that "the hour has come" for him to depart. Jesus lifted his eyes to the heaven and confirmed his accomplishment of the entrusted work: 

"And this is the eternal life, that they may know  
You the only true God, and Jesus Christ whom You had sent. 
I glorified You on the earth, having accomplished the work 
which You had given me to do." John 17:3/4. 

"But I do not seek my glory; there is One who seeks  
  and judges." John 8:50. 

If you abide in my word, then you are truly disciples of mine; 
And you shall know the truth,  
and the truth shall make you free.  John 8:31/32. 

"Let the People of the Injeel (the Gospel),   
judge by what Allah had revealed therein.  
If any do fail to judge by what Allah had revealed,  
they are those who rebel."  Qur'an 5:47. 

"Give this warning to those in whose (hearts) is the fear, 
that they will be brought (to Judgment) before their Lord: 
for whom there is no protecting friend  
nor intercessor besides Him,  
that they may ward off (evil)."   Qur'an 6:51