Sahih Muslim
The Book Pertaining to Repentance and Exhortation to Repentance (Kitab Al-Tauba)
Book Number: 037 / Hadith Number: 6619
Anas b. Malik reported that Allah's Messenger (may peace be upon him) said: Allah is more pleased with the repentance of His servant than if one of you gets up and he finds his camel missing in a waterless desert (and then he accidentally finds it). This hadith has been narrated on the authority of Anas b. Malik through another chain of transmitters.