Abu Hashim al-Rmany أبو هاشم الرماني · General Behavior (Kitab Al-Adab)

There are some expressions which a man utters three times when he gets up from an assembly he will be forgiven for what happened in the assembly; and no one utters them in an assembly held for a noble cause or for remembrance of Allah but that is stamped with them just as a document is stamped with a signet-ring. These expressions are: Glory be to Thee, O Allah, and I begin with praise of Thee, there is no god…

When we were with Ibn ‘Umar, he heard the sound of a man who was blowing a pipe. He then mentioned a similar tradition. Abu Dawud said : This is more rejected.