Abu Bakrah said that he came to the mosque when the prophet ﷺ was bowing. So I bowed outside the row (before joining it). The prophet ﷺ said; May Allah increase your eagerness! But do not do it again. (Using translation from Abū Dāʾūd 683)
أَنَّهُ دَخَلَ الْمَسْجِدَ وَالنَّبِيُّ ﷺ رَاكِعٌ فَرَكَعَ قَبْلَ أَنْ يَصِلَ إِلَى الصَّفِّ فَقَالَ لَهُ النَّبِيُّ ﷺ زَادَكَ اللهُ حِرْصًا وَلَا تَعُدْ