Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: None of you should give Satan a share of himself, by thinking that it is binding on him to turn away from the prayer only from his right side. I have seen the Messenger of Allah (peace and blessings be upon him) most often turning away from his left side.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10125