Chapter: What Has Been Related About Making Signals During Salat
Suhaib narrated: I passed by Allah's Messenger (S) while he was performing Salat, so I said greeted him with Salam, and he returned it by making signals. He said: I do not know except that he said: 'He indicated with his finger.'
Ibn Umar narrated: I said to Bilal: 'How did the Prophet (S) reply to them when they gave him Salams and he was performing Salat?' He said: 'He would motion with his hand.'