The Book of Mosques and Places of Prayer
5/22. Chapter:
The salam to exit the prayer when one has finished and how it is done
Sahih Muslim
وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا أَبُو عَامِرٍ الْعَقَدِيُّ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ، عَنْ إِسْمَاعِيلَ بْنِ مُحَمَّدٍ، عَنْ عَامِرِ بْنِ سَعْدٍ، عَنْ أَبِيهِ، قَالَ كُنْتُ أَرَى رَسُولَ اللَّهِ صلى الله عليه وسلم يُسَلِّمُ عَنْ يَمِينِهِ وَعَنْ يَسَارِهِ حَتَّى أَرَى بَيَاضَ خَدِّهِ .
'Amir b. Sa'd reported: I saw the Messenger of Allah (may peace be open him) pronouncing taslim on his right and on his left till I saw the whiteness of his cheek.
Reference : Sahih Muslim 582In-book reference : Book 5, Hadith 153USC-MSA web (English) reference : Book 4, Hadith 1208