عَنْ أَنَسِ بْنِ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: إِنَّ أَبَا بَكْرٍ وَعُمَرَ وَعُثْمَانَ كَانُوا يُتِمُّونَ التَّكْبِيرَ فَيَكَبِّرُونَ إِذَا سَجَدُوا وَإِذَا رَفَعُوا أَوْ خَفَضُوا كَبَّرُوا
Sayyiduna Anas bin Malik (may Allah be pleased with him) says: Sayyiduna Abu Bakr, Sayyiduna Umar, and Sayyiduna Uthman (may Allah be pleased with them) used to say Takbeer when they prostrated, when they stood up, and when they bowed.