مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3607
Musnad of Abdullah bin Mas'ood
It was narrated that 'Abdullah said: No one of you should give a share of himself to the Shaitan by thinking that it is obligatory to leave to the right only (after finishing the prayer). Most of the time I saw the Messenger of Allah (ﷺ) leave to his left.
Musnad Ahmad 3631Its isnad is saheeh, al-Bukhari (852) and Muslim (707)]