Abu Bakrah came when the apostle of Allah (ﷺ) was bowing. So he bowed without the row (before joining it). He then went to the row. When the prophet (ﷺ) finished his prayer, he said: which of your bowed without the row, and then went to the row? Abu Bakrah said; it was i. the prophet (ﷺ) said: May Allah increase your eagerness ! but do not do it again.
Reference: Sunan Abi Dawud 684 In-book : Book 2, Hadith 294 English translation : Book 2, Hadith 684
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