Raising the hands until they are level with the highest part of the ears
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا يَزِيدُ، - وَهُوَ ابْنُ زُرَيْعٍ - قَالَ حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، عَنْ نَصْرِ بْنِ عَاصِمٍ، أَنَّهُ حَدَّثَهُمْ عَنْ مَالِكِ بْنِ الْحُوَيْرِثِ، أَنَّهُ رَأَى رَسُولَ اللَّهِ صلى الله عليه وسلم يَرْفَعُ يَدَيْهِ إِذَا رَكَعَ وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ حَتَّى يُحَاذِيَ بِهِمَا فُرُوعَ أُذُنَيْهِ " .
It was narrated from Malik bin Al-Huwairith that: He saw the Prophet (ﷺ) raise his hands when he bowed, and when he raised his head from bowing, until they were in level with the highest part of his ears.