"I saw the Messenger of Allah ﷺ saying the takir every time he went down or came up, or stood or sat, and he said the salam to his right and to his left: As-salamu 'alaykum wa rahmatullah, as-salamu alaykum wa rahmatullah (peace be upon you and the mercy of Allah, peace be upon you and the mercy of Allah) until the whiteness of his cheek could be seen . And I saw Abu Bakr and 'Umar, may Allah (WT) be pleased with them, doing likewise." (Using translation from Nasāʾī 1319)  

رَأَيْتُ رَسُولَ اللهِ ﷺ يُكَبِّرُ فِي كُلِّ خَفْضٍ وَرَفْعٍ وَقِيَامٍ وَقُعُودٍ وَيُسَلِّمُ عَنْ يَمِينِهِ وَعَنْ شِمَالِهِ «السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ وَبَرَكَاتُهُ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ» حَتَّى يُرَى بَيَاضُ خَدِّهِ وَرَأَيْتُ أَبَا بَكْرٍ وَعُمَرَ يَفْعَلَانِ ذَلِكَ  

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." (Using translation from Nasāʾī 1320)  

عَنْ صَلَاةِ رَسُولِ اللهِ ﷺ فَقَالَ اللهُ أَكْبَرُ كُلَّمَا وَضَعَ اللهُ أَكْبَرَ كُلَّمَا رَفَعَ ثُمَّ يَقُولُ «السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ» عَنْ يَمِينِهِ «السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ» عَنْ يَسَارِهِ