[Machine] I prayed behind Abdul Rahman Al-Yahsibi and he gave the salam (greeting) from his right, saying, "Peace be upon you and the mercy of Allah." Then he gave the same salam from his left. I asked him, "Where did you get this from?" He replied, "I prayed behind Wael bin Hujr and he said, 'I prayed behind the Messenger of Allah ﷺ and he did the same until I saw the whiteness of his cheeks.'"  

صَلَّيْتُ خَلْفَ عَبْدِ الرَّحْمَنِ الْيَحْصِبِيِّ فَسَلَّمَ عَنْ يَمِينِهِ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ وَعَنْ يَسَارِهِ مِثْلَ ذَلِكَ قَالَ قُلْتُ لَهُ مِنْ أَيْنَ أَخَذْتَ هَذَا؟ قَالَ صَلَّيْتُ خَلْفَ وَائِلِ بْنِ حُجْرٍ قَالَ «صَلَّيْتُ خَلْفَ رَسُولِ اللهِ ﷺ فَفَعَلَ مِثْلَ ذَلِكَ حَتَّى رَأَيْتُ بَيَاضَ خَدَّيْهِ»