He saw that when the Prophet ﷺ stood up to pray he raised his hands till they were in front of his shoulders and placed his thumbs opposite his ears; then he uttered the Takbir (Allah is most great).
أَنَّهُ أَبْصَرَ النَّبِيَّ ﷺ حِينَ قَامَ إِلَى الصَّلاَةِ رَفَعَ يَدَيْهِ حَتَّى كَانَتَا بِحِيَالِ مَنْكِبَيْهِ وَحَاذَى بِإِبْهَامَيْهِ أُذُنَيْهِ ثُمَّ كَبَّرَ