Sunan Abi Dawud 684
سنن أبي داود#684SahihAl-Hasan reported :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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih
In-book reference: 2:294