Sarg 60 - Raam Meets Chyavan Rishi 

Next day when Raam came in Royal court, Sumantra came and said  to Raam - "Hey Raajan, Maharshi Chyavan has come to see you along with some Tapaswee." By the order of Raam, Sumantra brought them in. Those Tapaswee were more than a hundred in number. They brought holy water from various Teerth and various fruits. Raam welcomed them and asked them - "Tell me anything which I can do for you." I am at your service along with my life. I will surely obey you." Rishi said - "Hey Raajan, We went to several glorious kings, but nobody could do our work and you have promised to do that without listening to it, therefore it seems, only you will do our work."

Sarg 61 - Rishi Pray to Kill Lavanaasur 

Chyavan Rishi said - "Hey Mahaaraaj, We have a great fear, listen to the reason of that fear. In Sat Yug, there was a Daitya Madhu, Leelaa's son, who was very intelligent and protector of the people who asked for shelter. Pleased with his Tap, Shankar Jee took out a Shool from His own Shool and gave it to him and said - "Whoever will fight with you, this Shool will burn him and come back to you. But if you will fight with Braahman, or Devtaa then this Shool will not be with you."

Madhu said joining his palms - "Hey Prabhu, Kindly give me this Vardaan that this should be with everybody whoever is in our Vansh." Rudra said - "Only your son will have this Trishool, after that it will not be there. Any living being will not be able to kill your son till he will have this Shool in his hand." Hey Raajan, Later he had an evil son named Lavan. Madhu found his son very sinful so Madhu left this Lok and went to Varun Lok. But he told everything to his son about the Shool given by Rudra and the secret along with the Vardaan before he left. Now that Lavanaasur is troubling all three Lok, Hey Raam, you have killed raavan, now please protect us by killing him also. We have been to all kings of Prithvi, but nobody got ready to kill him."

Sarg 62 - Shatrughn Proposes to Go to Kill Lavanaasur 

Hearing all this Raam said to Rishi - "What type of nature he has? What does he eat?" Rishi said - "Normally he eats anything, but his main food is Tapaswee. He lives in Madhu Van and eats thousands of lions, deer, birds and Tapaswee every day." "We will kill him in fight, you do not worry about it." Saying this to Rishi, Raam said to His brothers - "Who among you will kill this Raakshas?" Bharat said - "This is mine, I will kill him." Hearing Bharat, Shatrughn said - "Brother Bharat has already tolerated a lot of troubles. He wore Jataa and Sanyaasee like clothes, slept on floor [while you were away]. Therefore please do not give this job to him, I will do this work."

Raam said - "Hey Shatru, You are mighty and intelligent, you are good in administration also, so you go, kill Lavanaasur and establish your kingdom on the banks of Yamunaa. One is sinner if somebody kills a Raajaa and then does not administer that country. That is why you go there and rule this kingdom properly. You need not have any objection in this because you should obey me. So accept this kingdom. Gurudev Vashishth will do your Raaj Tilak.