Musannaf Ibn Abi Shayba 3:2112

Muhammad ibn Fudayl narrated to us, from al-A’mash, from Ibrahim, from Alqama, who said: He prayed, and he rose during the two rak'ahs, but he did not stand up straight. The people glorified Allah (said SubhanAllah) for him, so he sat down. He did not perform the two prostrations of forgetfulness for that.