مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3565
Musnad of Abdullah bin Mas'ood
It was narrated that 'Abdullah (رضي الله عنه) said: When one of you bows, let him put his forearms on his thighs, and bow down, and put his hands together. It is as if I can see the interlaced fingers of The Messenger of Allah (ﷺ). Then he put his hands together and showed them.
Musnad Ahmad 3588lts isnad is saheeh, Muslim (534)]