[Machine] I have seen the Messenger of Allah ﷺ greet by saying "peace be upon you and the mercy of Allah" until the whiteness of his cheek is visible and the same is seen from the other side.
لَقَدْ رَأَيْتُ رَسُولَ اللهِ ﷺ يُسَلِّمُ «السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ» حَتَّى يُرَى بَيَاضُ خَدِّهِ وَمَنِ الْجَانِبِ الْآخَرِ مِثْلَ ذَلِكَ