´Abu Bakrah narrated that he entered the Masjid when the when the Prophet (ﷺ) was bowing, so he bowed outside the row. The Prophet said:` "May Allah increase you in keenness, but do not do this again."
Hadith ReferenceSunan an-Nasa'i / The Book of Leading the Prayer (Al-Imamah) / Hadith: 872
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري