Sunan an-Nasa'i, Volume 2, Book 13, Hadith 1361 (DarusSalam)

It was narrated that Al-Aswad said: "Abdullah said: 'No one among you should allow the Shaitan to give him wrong ideas by making him believe that he can only leave after praying by moving to his right, because I saw the Messenger of Allah usually departing to the left.'"

أَخْبَرَنَا أَبُو حَفْصٍ، عَمْرُو بْنُ عَلِيٍّ قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا الأَعْمَشُ، عَنْ عُمَارَةَ، عَنِ الأَسْوَدِ، قَالَ قَالَ عَبْدُ اللَّهِ لاَ يَجْعَلَنَّ أَحَدُكُمْ لِلشَّيْطَانِ مِنْ نَفْسِهِ جُزْءًا يَرَى أَنَّ حَتْمًا عَلَيْهِ أَنْ لاَ يَنْصَرِفَ إِلاَّ عَنْ يَمِينِهِ لَقَدْ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم أَكْثَرَ انْصِرَافِهِ عَنْ يَسَارِهِ ‏.‏

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