The Prophet ﷺ used to give the salutation to his left and right sides until the whiteness of his cheek was seen, (saying: "Peace be upon you, and mercy of Allah" twice. AbuDawud said: This is a version of the tradition reported by AbuSufyan. The version of Isra'il did not explain it. AbuDawud said: This tradition has been narrated by Zubayr from AbuIshaq and Yahya ibn Adam from Isra'il from AbuIshaq from AbdurRahman ibn al-Aswad from his father from Alqamah on the authority of Abdullah ibn Mas'ud. AbuDawud said: Shu'bah used to reject this tradition, the tradition narrated by AbuIshaq as coming from the Prophet ﷺ.  

أَنَّ النَّبِيَّ ﷺ كَانَ يُسَلِّمُ عَنْ يَمِينِهِ وَعَنْ شِمَالِهِ حَتَّى يُرَى بَيَاضُ خَدِّهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ 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  

When we prayed behind the Messenger of Allah ﷺ, one of us gave the salutation and pointed with his hand to the man to his right side and left side. When he finished his prayer, he said: What is the matter that one of you points with his hand (during prayer) just like the tails of restive horses. It is sufficient for one of you, or is it not sufficient for one of you to say in this manner? And he pointed with his finger; one should salute his brother at his right and left side.  

كُنَّا إِذَا صَلَّيْنَا خَلْفَ رَسُولِ اللَّهِ ﷺ فَسَلَّمَ أَحَدُنَا أَشَارَ بِيَدِهِ مِنْ عَنْ يَمِينِهِ وَمِنْ عَنْ يَسَارِهِ فَلَمَّا صَلَّى قَالَ مَا بَالُ أَحَدِكُمْ يَرْمِي بِيَدِهِ كَأَنَّهَا أَذْنَابُ خَيْلٍ شُمْسٍ إِنَّمَا يَكْفِي أَحَدَكُمْ أَوْ أَلاَ يَكْفِي أَحَدَكُمْ أَنْ يَقُولَ هَكَذَا وَأَشَارَ بِأُصْبُعِهِ يُسَلِّمُ عَلَى أَخِيهِ مَنْ عَنْ يَمِينِهِ وَمَنْ عَنْ شِمَالِهِ  

Is it not sufficient for one of you or for one of them that he puts his hand on his thigh, and then gives the salutation to his brother to his right and left sides.  

أَمَا يَكْفِي أَحَدَكُمْ أَوْ أَحَدَهُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يُسَلِّمُ عَلَى أَخِيهِ مَنْ عَنْ يَمِينِهِ وَمَنْ عَنْ شِمَالِهِ  

The Messenger of Allah ﷺ entered upon us while the people were raising their hands. The narrator Zubair said: I think( they were raising the hands) during prayer. He (the prophet) said: What is the matter, I see you raising your hands as if they are the tails of restive horses! Maintain tranquility during prayer.  

دَخَلَ عَلَيْنَا رَسُولُ اللَّهِ ﷺ وَالنَّاسُ رَافِعُو أَيْدِيهِمْ قَالَ زُهَيْرٌ أُرَاهُ قَالَ فِي الصَّلاَةِ فَقَالَ مَا لِي أَرَاكُمْ رَافِعِي أَيْدِيكُمْ كَأَنَّهَا أَذْنَابُ خَيْلٍ شُمْسٍ اسْكُنُوا فِي الصَّلاَةِ