Sahih al-Bukhari 783
Book 10: Call to Prayers (Adhaan) · Narrated by Abu Bakra
Arabic
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، قَالَ حَدَّثَنَا هَمَّامٌ، عَنِ الأَعْلَمِ ـ وَهْوَ زِيَادٌ ـ عَنِ الْحَسَنِ، عَنْ أَبِي بَكْرَةَ، أَنَّهُ انْتَهَى إِلَى النَّبِيِّ صلى الله عليه وسلم وَهْوَ رَاكِعٌ، فَرَكَعَ قَبْلَ أَنْ يَصِلَ إِلَى الصَّفِّ، فَذَكَرَ ذَلِكَ لِلنَّبِيِّ صلى الله عليه وسلم فَقَالَ " زَادَكَ اللَّهُ حِرْصًا وَلاَ تَعُدْ ".
English translation
Narrated Abu Bakra:I reached the Prophet (ﷺ) in the mosque while he was bowing in prayer and I too bowed before joining the row. I mentioned it to the Prophet (ﷺ) and he said to me, "May Allah increase your love for the good. But do not repeat it again (bowing in that way)
Reference: Sahih al-Bukhari 783, Book of Call to Prayers (Adhaan). English translation by Dr. Muhammad Muhsin Khan.