Sunan an-Nasa'i #882 · The Book of the Commencement of the Prayer

Sunan an-Nasa'iIt was narrated from Abdul-Jabbar bin Wa'il
Sunan an-Nasa'i · Book 11 · The Book of the Commencement of the Prayer
Sunan an-Nasa'i · كتاب 11 · كتاب افتتاح الصلاة
He saw the Prophet (ﷺ), when he started to pray, raise his hands until his thumbs were almost level with his earlobes
أَخْبَرَنَا مُحَمَّدُ بْنُ رَافِعٍ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ بِشْرٍ، قَالَ حَدَّثَنَا فِطْرُ بْنُ خَلِيفَةَ، عَنْ عَبْدِ الْجَبَّارِ بْنِ وَائِلٍ، عَنْ أَبِيهِ، أَنَّهُ رَأَى النَّبِيَّ صلى الله عليه وسلم إِذَا افْتَتَحَ الصَّلاَةَ رَفَعَ يَدَيْهِ حَتَّى تَكَادَ إِبْهَامَاهُ تُحَاذِي شَحْمَةَ أُذُنَيْهِ ‏.‏
Reference : Sunan an-Nasa'i 882In-book reference : Book 11, Hadith 7