Location of the thumbs when raising the hands Sunan an-Nasa'i 882

Arabic hadith text
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 وسلمإِذَا افْتَتَحَ الصَّلاَةَ رَفَعَ يَدَيْهِ حَتَّى تَكَادَ إِبْهَامَاهُ تُحَاذِي شَحْمَةَ أُذُنَيْهِ ‏.‏
Translation
It was narrated from Abdul-Jabbar bin Wa'il, from his father, that

He saw the Prophet (ﷺ), when he started to pray, raise his hands until his thumbs were almost level with his earlobes.