1173 - وَ رَوَى مُحَمَّدُ بْنُ سَهْلٍ عَنْ أَبِيهِ قَالَ: سَأَلْتُ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ عَمَّنْ رَكَعَ مَعَ إِمَامِ قَوْمٍ يُقْتَدَى بِهِ ثُمَّ رَفَعَ رَأْسَهُ قَبْلَ اَلْإِمَامِ قَالَ «يُعِيدُ رُكُوعَهُ مَعَهُ.
Hadith.1173 - Muhammad ibn Sahl narrated from his father who said:
“I asked Imam Al-Ridha 
about a person who bows (in ruku') with an Imam of a congregation who is followed, and then raises his head before the Imam.”
Imam replied: "He should repeat his bowing (ruku') with him."
