Midrash su Salmi 108:10

RABBI ELIEZER AND THE TORAH
THE following befell Rabbi Eliezer, son of Hyrḳanos. His father had many ploughmen who were ploughing arable ground, whereas he was ploughing a stony plot; he sat down and wept. His father said to him: O my son! Why dost thou weep? Art thou perchance distressed because thou dost plough a stony plot? In the past thou hast ploughed a stony plot, now behold thou shalt plough with us arable soil. He sat down on the arable ground and wept. His father said to him: But why dost thou weep? Art thou perchance distressed because thou art ploughing the arable land? He replied to him: No. (Hyrḳanos) said to him: Why dost thou weep? He answered him: I weep only because I desire to learn Torah. (Hyrḳanos) said to him: Verily thou art twenty-eight years old—yet dost thou desire to learn Torah? Nay, go, take thee a wife and beget sons and thou wilt take them to the school. He fasted two weeks not tasting || anything, until Elijah— may he be remembered for good—appeared to him and said to him: Son of Hyrḳanos! Why dost thou weep? He replied to him: Because I desire to learn Torah. (Elijah) said to him: If thou desirest to learn Torah get thee up to Jerusalem to Rabban Jochanan ben Ẓakkai. He arose and went up to Jerusalem to R. Jochanan ben Ẓakkai and sat down and wept. (R. Jochanan) said to him: Why dost thou weep? He answered him: Because I wish to learn Torah. (R. Jochanan) said to him: Whose son art thou? But he did not tell him.