Riyad us Saliheen: Hadith 1428

The Messenger of Allah (ﷺ) used to say in his prostration: Allahum-maghfir li dhanbi kullahu: diqqahu wa jillahu, wa 'awwalahu wa akhirahu, wa alaniyatahu wa sirrahu (O Allah! Forgive all my sins, the small and the great, first and the last, the open and the secret)."

[Muslim].