Hadith 1624
Narrated Ali ibn Abu Talib: Al-Abbas asked the Prophet ﷺ about paying the sadaqah (his zakat) in advance before it became due, and he gave permission to do that. Abu Dawud said: This tradition has also been transmitted by Hushaim through a different chain of narrators. The version of Hushaim is more sound.
Hadith 4859
Narrated Abu Barzah al-Aslami: When the Messenger of Allah ﷺ intended to get up from the assembly he used to say in the last. Glory be to Thee. O Allah, and I begin with praise of Thee, I testify that there is no god but Thou; I ask Thy pardon, and return to Thee in repentance. The man asked: Messenger of Allah! you utter the words now which you did not do in the past? He replied: (This is an) atonement for what takes place in the assembly.