The Prophet (peace and blessings of Allah be upon him) taught his Companions (may Allah be pleased with them) everything related to prayer: movements, stillness, and other matters. The Companions used to observe him and learn from him, and they transmitted this to those who came after them (may Allah be pleased with them all).In this Hadith, Abu Hurayrah (may Allah be pleased with him) says: "When the Messenger of Allah (peace and blessings of Allah be upon him) entered into prayer," meaning: when he began it and pronounced the first Takbir, which is the Takbir of Ihram, "he would raise his hands outstretched," meaning: he would raise his hands upward, aligning them with his head or close to that, or other ways that have been narrated regarding his manner (peace and blessings of Allah be upon him) of raising them.This Hadith demonstrates the Companions' meticulous observation of the Prophet's (peace and blessings of Allah be upon him) actions and their transmission of these actions to others..