Sahih Muslim
The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness (Kitab Al-Dhikr)
Book Number: 035 / Hadith Number: 6539
Anas reported that Allah's Messenger (may peace he upon him) wed to make this supplication:" O Allah, I seek refuge in Thee from miserliness, from sloth and from decrepitude."