مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3658
Musnad of Abdullah bin Mas'ood
It was narrated that "Alqamah said Ibn Mas'ood (رضي الله عنه) said: Shall I not show you how The Messenger of Allah (ﷺ) prayed? Then he prayed, and he only raised his hands once.
Musnad Ahmad 3681Its men are thiqat]