The Jataka, Vol. II, tr. by W.H.D. Rouse, , at sacred-texts.com
"Why are hearts cold," etc.--This story the Master told during a stay near Sāketa, about a brahmin named Sāketa. Both the circumstances that suggested the story and the story itself have already been given in the First Book 3.
...And when the Tathāgata had gone to the monastery, the Brother asked, "How, Sir, did the love begin? "and repeated the first stanza:--
The Master explained the nature of love by the second stanza:
After this discourse was ended, the Master identified the Birth:--"These two people were the brahmin and his wife in the story; and I was their son."
162:3 No. 68.