Musannaf Ibn Abi Shayba 33:60

Mu'awiyah ibn Hisham narrated to us, he said: Sufyan narrated to us, from Zayd ibn Aslam, from 'Abdullah ibn 'Ubayd, from his father, he said: Musa said: "O my Lord, You mentioned Ibrahim, Ishaq, and Ya'qub; for what did You give them that?" He said: "As for Ibrahim, he did not equate anything with Me, but he chose Me. And as for Ishaq, he offered his soul, and he was more generous with it than with anything else. And as for Ya'qub, I did not test him with a trial except that he increased in good opinion of Me."