Sunan an-Nasa'i, Hadith 1026 ⓘ
It was narrated from 'Alqamah, that Abdullah said: "Shall I not tell you about the prayer of the Messenger of Allah? He stood and raised his hands the first time and then he did not do that again."
أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ، عَنْ سُفْيَانَ، عَنْ عَاصِمِ بْنِ كُلَيْبٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الأَسْوَدِ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ أَلاَ أُخْبِرُكُمْ بِصَلاَةِ، رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ فَقَامَ فَرَفَعَ يَدَيْهِ أَوَّلَ مَرَّةٍ ثُمَّ لَمْ يُعِدْ .
also referenced under: Book 11, Hadith 151 (In-Book) & Volume 2, Book 11, Hadith 1027 (DarusSalam)