Now Yayaati and Devayaanee had a son, so Sharmishthaa also expressed her desire to Yayaati to have a son. Yayaati considered it according to Dharm so they also had a son.

After some time Devayaanee had three sons and Sharmishthaa had two sons. When Devayaanee came to know about this she got very angry and went to her father's house. When Yayaati heard of her leaving, he also followed her. He explained the situation to Devayaanee and Shukraachaarya Jee but Shukraachaarya Jee gave him Shaap that "he should get that kind of old look in which a person looks ugly". Yayaati told him that this would affect his daughter also, so he said "OK, you can exchange your old age with somebody, if at all somebody is ready to exchange his youth with your old age". 

Yayaati called his all sons and asked them to give him their youth in exchange of the old age Shukraachaarya gave to him. He said to them - "One of you will have to give me youth to become a king of this kingdom." He first asked his eldest son, he replied - "Women and servants will mock me if I will look old in this young age. Ask your younger sons who are dearer to you." Then he called his second son and asked the same thing, he said - "It destroys strength and beauty and wisdom. I am not strong enough to do so."

The third son said - "An old man cannot ride horse or an elephant. His speech is also falter. I am not ready for that." His fourth son begged to be forgiven from this, as an old man had to seek others help even to clean their body. Now Yayaati begged his youngest son - "You have to help me in this situation." Puru, the youngest son, said - "This is my good luck that I can be of any use of yours. I gladly give you my youth and take your old age. Be happy."

Hearing this Yayaati embraced him. As he touched him he became young and his son became old.  So Puru enjoyed the kingdom and Yayaati enjoyed his life and worldly pleasures for long time. When he was not satisfied yet, he went to Kuber's garden where he spent many years with a maiden Apsaraa. One day Vairaagya arose in his mind and he gave his youth back to his son, took his old age back and went to forest. His wives also went with him.

Once Indra invited Yayaati to Heaven, He sent His Saarathee Maatali to bring him. On the way they had some philosophical discussion which made such an impression on Yayaati that he could exempt his public from passion and death. After some time Yam complained that now no man was dying on Earth. Hearing this Indra sent Kaam Dev and his daughter Ashrubindumatee to excite a passion in Yayaati's breast. He got affected and he asked the youth from his sons. All his sons refused to give him their youth, but Puru. Then Puru's young wife, instigated by Indra persuaded her husband to go to Heaven and then Indra restored his youth.