Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates: I prayed with the Prophet (peace and blessings be upon him), and I stood on his left side ((peace and blessings be upon him)), so he ((peace and blessings be upon him)) took hold of me and made me stand on his right side.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12113