He asked 'Abdullah bin 'Umar about the prayer of the Messenger of Allah ﷺ. He said: "Allahu Akbar" every time he went down and "Allahu Akbar" every time he came up, then he said: "As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) to his right and: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) to his left."  

عَنْ صَلاَةِ رَسُولِ اللَّهِ ﷺ فَقَالَ اللَّهُ أَكْبَرُ كُلَّمَا وَضَعَ اللَّهُ أَكْبَرُ كُلَّمَا رَفَعَ ثُمَّ يَقُولُ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ عَنْ يَمِينِهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ عَنْ يَسَارِهِ  

"I said to Ibn 'Umar: "Tell me about the prayer of the Messenger of Allah ﷺ; how was it?" He mentioned the takbir and he mentioned: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) to his right and: As-salamu 'alaykum (peace be upon you) to his left."  

أَخْبِرْنِي عَنْ صَلاَةِ رَسُولِ اللَّهِ ﷺ كَيْفَ كَانَتْ قَالَ فَذَكَرَ التَّكْبِيرَ قَالَ يَعْنِي وَذَكَرَ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ عَنْ يَمِينِهِ السَّلاَمُ عَلَيْكُمْ عَنْ يَسَارِهِ  

The Prophet ﷺ said: "It is as if I can see the whiteness of his cheek, saying to his right: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) and to his left: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah)." (Sahih  

عَنِ النَّبِيِّ ﷺ قَالَ كَأَنِّي أَنْظُرُ إِلَى بَيَاضِ خَدِّهِ عَنْ يَمِينِهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَعَنْ يَسَارِهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ  

I offered prayer along with the Prophet ﷺ. He would give the salutation to his right side (saying): Peace be upon you and the mercy of Allah and His blessings; and to his left side (saying): Peace be upon you and mercy of Allah.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ فَكَانَ يُسَلِّمُ عَنْ يَمِينِهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَبَرَكَاتُهُ وَعَنْ شِمَالِهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ  

“The Messenger of Allah ﷺ used to say the Salam to his right and to his left, until the whiteness of his cheek could be seen (saying): ‘As-salamu ‘alaikum wa rahmatullah, as-salamu ‘alaikum wa rahmatullah.’”  

كَانَ رَسُولُ اللَّهِ ﷺ يُسَلِّمُ عَنْ يَمِينِهِ وَعَنْ يَسَارِهِ حَتَّى يُرَى بَيَاضُ خَدِّهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ  

“The Messenger of Allah ﷺ used to say the Salam to his right and to his left, until the whiteness of his cheek could be seen (saying): ‘As-salamu ‘alaikum wa rahmatullah, as-salamu ‘alaikum wa rahmatullah.’” (Using translation from Ibn Mājah 916)   

أَنَّ النَّبِيَّ ﷺ كَانَ يُسَلِّمُ عَنْ يَمِينِهِ وَعَنْ يَسَارِهِ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ حَتَّى يُرَى بَيَاضُ خَدِّهِ  

"I said to Ibn 'Umar: "Tell me about the prayer of the Messenger of Allah ﷺ; how was it?" He mentioned the takbir and he mentioned: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) to his right and: As-salamu 'alaykum (peace be upon you) to his left." (Using translation from Nasāʾī 1321)   

أَخْبِرْنِي عَنْ صَلَاةِ رَسُولِ اللهِ ﷺ كَيْفَ كَانَتْ؟ قَالَ فَذَكَرَ التَّكْبِيرَ كُلَّمَا وَضَعَ رَأْسَهُ وَكُلَّمَا رَفَعَهُ وَذَكَرَ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ عَنْ يَمِينِهِ السَّلَامُ عَلَيْكُمْ عَنْ يَسَارِهِ