Sahih Muslim
The Book Pertaining to Repentance and Exhortation to Repentance (Kitab Al-Tauba)
Book Number: 037 / Hadith Number: 6620
Abu Sirma reported that when the time of the death of Abu Ayyub Ansari drew near, he said: I used to conceal from you a thing which I heard from Allah's Messenger (may peace be upon him) and I heard Allah's Messenger (may peace be upon him) as sayirig: Had you not committed sins, Allah would have brought into existence a creation that would have committed sin (and Allah) would have forgiven them.