Musannaf Ibn Abi Shaybah

Hazrat Ahnaf bin Qais narrates from the Noble Prophet (peace be upon him), he (peace be upon him) said: Indeed, Dawud (peace be upon him) said: O my Lord! Indeed, the Children of Israel ask You by the means of Ibrahim, Ishaq, and Yaqub (three prophets), so make me the fourth among them. He (peace be upon him) said: Upon this, Allah the Exalted revealed to him: O Dawud! Ibrahim was thrown into the fire for My (Oneness being proclaimed), and he was patient over it, and you did not go through this trial. Ishaq had to offer his life as a sacrifice for My (pleasure), and he was patient over it, and this test did not come upon you. And Yaqub, I kept his beloved separated from him, until (from weeping) whiteness came into his eyes, and he was patient over it, and this affliction also did not befall you.