Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "When the muezzin gives the call to prayer (adhan), Satan leaves the mosque, passing wind as he goes. When the muezzin becomes silent, Satan returns. Then when the muezzin gives the iqamah, Satan again leaves the mosque, passing wind as he goes. When the muezzin becomes silent, he returns. He comes to the Muslim person during his prayer and creates various thoughts in his mind, so that he no longer remembers whether he has added to or omitted something from his prayer. When a person faces this situation, then when he is sitting (i.e., during the tashahhud), he should perform two prostrations of forgetfulness (sajda sahw); he should do this before saying the final salam, and then say the salam."