Characteristics of Prayer
Bukhari :: Book 1 :: Volume 12 :: Hadith 750
Narrated Abu Bakra:
I reached the Prophet in the mosque while he was bowing in prayer and I too bowed before joining the row mentioned it to the Prophet and he said to me, "May Allah increase your love for the good. But do not repeat it again (bowing in that way)."
Source materials are from the University of Southern California MSA site
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