Al-Bara who is not a liar said; when they (the companions) raised their heads from bowing along with the Messenger of Allah ﷺ, they would stand up, and when they saw him that he went down in prostration, they would prostrate (following the prophet). (Using translation from Abū Dāʾūd 620)
حَدَّثَنِي الْبَرَاءُ وَهُوَ غَيْرُ كَذُوبٍ أَنَّهُمْ «إِذَا صَلَّوْا مَعَ رَسُولِ اللهِ ﷺ وَرَفَعُوا رُءُوسَهُمْ مِنَ الرُّكُوعِ قَامُوا قِيَامًا حَتَّى يَرَوْهُ قَدْ سَجَدَ»