حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، عَنْ زِيَادٍ الأَعْلَمِ، عَنِ الْحَسَنِ، عَنْ أَبِي بَكْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم دَخَلَ فِي صَلاَةِ الْفَجْرِ فَأَوْمَأَ بِيَدِهِ أَنْ مَكَانَكُمْ ثُمَّ جَاءَ وَرَأْسُهُ يَقْطُرُ فَصَلَّى بِهِمْ ‏.‏

This tradition has been reported by Hammad b. Salamah through the same chain of narrators and conveying a similar meaning. This version adds in the beginning

Abu Dawud said : This tradition has been narrated al-Zuhri from Abu Salamah b. ‘Abd al-Rahman on the authority of Abu Hurairah. It says: When he stood at the place of prayer, we waited for his utterance of takbir (Allah-u akbar).He went away and said : (remain) as you were.

Another version on the authority of Muhammad reporting from the Prophet (ﷺ) says: He uttered takbir (Allah-u-Akbar) and then made a sign to the people, meaning "sit down". He then went away and took a bath. This tradition has also been narrated through a different chain. It says: The Messenger of Allah (ﷺ) uttered takbir (Allah-u-akbar) in a prayer.

Abu Dawud said: Another version through a different chain says; The Prophet (May peace be upon him) uttered takbir (Allah-u akbar).