ENOfficial
It was narrated from Kathir bin ‘Abdullah, from his father, from his grandfather, that the Messenger of Allah (ﷺ) said the Takbir five times.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ الْحِزَامِيُّ، حَدَّثَنَا إِبْرَاهِيمُ بْنُ عَلِيٍّ الرَّافِعِيُّ، عَنْ كَثِيرِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ كَبَّرَ خَمْسًا .
sunnah.com