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.
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
The Messenger of Allah (sallallahu alayhi wa sallam) was free from purposeless speech; his action was a teaching for the Ummah. Therefore, every Muslim should practice this blessed supplication.
Furthermore, one should make every possible effort to keep their gatherings free from vain talk, so that there is no backbiting, slander, lying, idle chatter, or loud laughter in them.
And to think that, since I will recite the supplication of expiation for the gathering (du'a-e-kafarah majlis) at the end, I can say and do whatever I wish, is impermissible. It is not known whether one will get the opportunity to recite the supplication or not, and then whether it will be accepted or not.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4859