Raising of the hands (rafʿ al-yadayn رفع اليدين) only once at the beginning of the Ṣalāh
TIRMIDHI 257:
from ʿAlqamah —
ʿAbdullāh b. Masʿūd said: "Shall I not demonstrate the Ṣalāh of Messenger ﷺ of Allah to you?" Then he offered the Ṣalāh and he did not raise his hands except while saying the first takbīr."
الترمذي ٢٥٧:
عن علقمه —
قَالَ عَبْدُ اللَّهِ بْنُ مَسْعُودٍ أَلاَ أُصَلِّي بِكُمْ صَلاَةَ رَسُولِ اللَّهِ ﷺ؟ فَصَلَّى، فَلَمْ يَرْفَعْ يَدَيْهِ إِلاَّ فِي أَوَّلِ مَرَّةٍ۔