Al-Suddi said: I asked Sayyiduna Anas bin Malik (may Allah be pleased with him): When I have finished praying, which way should I turn, to my right or to my left? He said: I have mostly seen the Messenger of Allah (peace and blessings be upon him) turn to his right.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3615