سنن النسائي

Sa'eed bin Sam'an said Abu Hurairah came to the Masjid of Banu Zuraiq and said: "There are three things that the Messenger of Allah (ﷺ) used to do and the people have abandoned; he used to raise his hands extended when praying, and he would fall silent briefly, and say takbir when he prostrated and when he sat up."