You should not give away a part of your prayer to Satan by thinking that it is necessary to depart (after finishing the prayer) from one's right side only; I have seen the Prophet ﷺ often leave from the left side. (Using translation from Bukhārī 852)  

لَا يَجْعَلْ أَحَدُكُمْ لِلشَّيْطَانِ نَصِيبًا مِنْ صَلَاتِهِ يَرَى أَنَّ حَقًّا عَلَيْهِ أَنْ لَا يَنْصَرِفَ إِلَّا عَنْ يَمِينِهِ لَقَدْ «رَأَيْتُ رَسُولَ اللَّهِ ﷺ كَثِيرًا يَنْصَرِفُ عَنْ يَسَارِهِ»  

[Machine] I heard Anas saying, "I saw the Messenger of Allah (peace and blessings be upon him) turning away from his right side."  

سَمِعْتُ أَنَسًا يَقُولُ «رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَنْصَرِفُ عَنْ يَمِينِهِ»  

[Machine] "The Prophet, peace be upon him, turned his attention away from his right side, meaning during prayer."  

«انْصَرَفَ النَّبِيُّ ﷺ عَنْ يَمِينِهِ يَعْنِي فِي الصَّلَاةِ»