A man giving the salam when he arrives while the imam is giving the sermon

Yunus said: When al-Hasan arrived at the mosque during the sermon, he used to give the greeting of salam, and the people used to return his greeting.

Ibrahim said: The predecessors used to return the greeting of salam on Friday during the sermon, and they would also say 'Yarhamuk Allah' (may Allah have mercy on you) to one who sneezed.

Al-Hakam and Hammad said, concerning a man who enters the mosque on Friday after the imam has come out: He should give the greeting of salam, and the people should return his greeting. When he sneezes, they should say 'Yarhamuk Allah' (may Allah have mercy on you) to him.

Amir and Salim said: On Friday the greeting of salam is to be returned, and it is to be made audible.