The Messenger of Allah (ﷺ) said: The nearest a servant comes to his Lord is when he is prostrating himself, so make supplication (in this state).
Sahih Muslim Book 4, Hadith 245
← Previous Hadith I was forbidden to recite (the Qur'an) while I was bowing, and there is no mention of 'Ali in the chain of transmitters.

Sahih Muslim Book 4, Hadith 244 Next Hadith → The Messenger of Allah (ﷺ) used to say while prostrating himself: O Lord, forgive me all my sins, small and great, first and last, open and secret.

Sahih Muslim Book 4, Hadith 246