[Machine] I heard Anas saying that the Prophet ﷺ , Abu Bakr, Umar, and Uthman used to complete the takbeer by saying "Allahu Akbar" when they prostrated and when they raised their heads. Yahya said, "Or they made it shorter."
سَمِعْتُ أَنَسًا يَقُولُ إِنَّ النَّبِيَّ ﷺ وَأَبَا بَكْرٍ وَعُمَرَ وَعُثْمَانَ كَانُوا يُتِمُّونَ التَّكْبِيرَ يُكَبِّرُونَ إِذَا سَجَدُوا وَإِذَا رَفَعُوا قَالَ يَحْيَى أَوْ خَفَضُوا