Raising of the hands (rafʿ al-yadayn رفع اليدين) only once in prayer
Abdullah bin Mas'ud said: "Shall I not demonstrate the Ṣalāh of Messenger of Allah ﷺ to you?" Then he offered Ṣalāh and he did not raise his hands except while saying the first takbīr."
قَالَ رَسُولُ اللهِ ﷺ لَا يَحِلُّ لِامْرِئٍ مُسْلِمٍ أَنْ يُصْبِحَ فِي بَيْتِهِ بَعْدَ ثَلاثٍ مِنْ لَحْمِ نُسُكِهِ شَيْءٌ