Musannaf Ibn Abi Shayba 27:225

Ghundar narrated to us, from Shu'bah, from 'Amr ibn Murrah, from 'Abdullah ibn Salamah, from 'Ali, who said: He said—meaning Allah, the Almighty and Majestic—: "It is not for any servant of Mine to say, 'I am better than Yunus ibn Matta,' who glorified Allah in the darkness."