Ibrahim bin Suwayd said that he prayed behind Alqamah bin Qays, and he prayed five or six rak'ahs. It was said to him: You were mistaken. So he performed the two prostrations of forgetfulness, and he narrated from Sayyiduna Abdullah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) had done the same.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9811