Sahih Muslim
The Book Pertaining to the Excellent Qualities of the Holy Prophet (may Peace be upon them) and His Companions (Kitab Al-Fadail)
Book Number: 030 / Hadith Number: 5860
Abu Huraira reported Allah's Messenger (may prace be upon him) as saying that Allah, the Exalted and Majestic, said: It is not meet for a servant of Mine that he should say: I am better than Yunus b. Matta (peace be upon him).