Allah's Messenger (ﷺ) said, "When the Adhan for the prayer is pronounced, then Satan takes to his heelspassing wind so that he may not hear the Adhan and when the Mu'adh-dhin finishes, he comes back;and when the Iqama is pronounced he again takes to his heels and when it is finished, he again comesback and continues reminding the praying person of things that he used not to remember when not inprayer till he forgets how much he has prayed." Abu Salama bin `Abdur-Rahman said, "If anyone ofyou has such a thing (forgetting the number of rak`at he has prayed) he should perform twoprostrations of Sahu (i.e. forgetfulness) while sitting." Abu Salama narrates this from Abu Huraira.