Prayer

Malik :: Book 3 : Hadith 3.5.22

Yahya related to me from Malik from Abu Nuaym Wahb ibn Kaysan that Jabir ibn Abdullah used to teach them the takbir in the prayer. Abu Nuaym said, "He used to tell us to say 'Allah is greater' whenever we lowered or raised ourselves."

Source materials are from the University of Southern California MSA site
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