Musannaf Ibn Abi Shaybah

Hazrat Abu Huraira narrates that the Holy Prophet Muhammad (peace and blessings be upon him) performed the two prostrations of forgetfulness after saying the salam and after saying the takbeer. He performed a prostration and then said the takbeer. Then he raised his head and said the takbeer again. Then he performed a prostration and said the takbeer. Then he raised his head and said the takbeer again.

Hazrat Sha'bi narrates that Hazrat Sa'd and Hazrat Ammar performed three rak'ahs of prayer. When they were informed, they completed the remaining prayer and said salam, then said takbeer and performed sajdah, then said takbeer and raised their heads, then said takbeer and performed sajdah, then said takbeer and raised their heads.

Ibrahim performed the prostration of forgetfulness by saying the takbeer.