[Machine] That the Messenger of Allah ﷺ used to not complete the Takbeer. And in the narration of 'Amr from Ibn 'Abd al-Rahman ibn Abza from his father, he prayed with the Prophet ﷺ , and he used to not complete the Takbeer. So, he (the narrator) may have raised his hands for Takbeer but did not hear it, and he may have left it once to clarify the permissibility and Allah knows best.
أَنَّ رَسُولَ اللهِ ﷺ كَانَ لَا يُتِمُّ التَّكْبِيرَ وَفِي حَدِيثِ عَمْرٍو عَنِ ابْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى عَنْ أَبِيهِ أَنَّهُ صَلَّى مَعَ النَّبِيِّ ﷺ وَكَانَ لَا يُتِمُّ التَّكْبِيرَ فَقَدْ يَكُونُ كَبَّرَ وَلَمْ يَسْمَعْ وَقَدْ يَكُونُ تَرَكَ مَرَّةً لِيُبَيِّنَ الْجَوَازَ وَاللهُ أَعْلَمُ