Mishkat al-Masabih
Mishkat al-Masabih 1110
وَعَنْ أَبِي بَكْرَةَ أَنَّهُ انْتَهَى إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُوَ رَاكِعٌ فَرَكَعَ قَبْلَ أَنْ يَصِلَ إِلَى الصَّفِّ ثُمَّ مَشَى إِلَى الصَّفِّ. فَذَكَرَ ذَلِكَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ: «زَادَكَ اللَّهُ حِرْصًا وَلَا تعد» . رَوَاهُ البُخَارِيّ
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Abu Bakrah reported: He came upon the Prophet (ﷺ) while he was bowing, so he bowed before reaching the row and then walked to the row. He mentioned this to the Prophet, who said: May Allah increase your eagerness; do not do it again. Al-Bukhari transmitted it.
Notes and open questions — unreviewed
The Arabic says he bowed before reaching the row, then walked to join it; the Prophet praised his eagerness and told him not to repeat the act.