‘Abdallah b. Busr reported God's messenger as saying, “Blessed is he who finds a great amount of asking for pardon in his record.”
Ibn Majah transmitted it, and Nasa'i transmitted in 'Amal yaum walaila. 1
1. Mirqat, iii, 78 gives this as the title of a book by Nasa’i. The only reference to this tradition in the Concordance is Ibn Majah, Adab, 57.