Sahih Muslim Book - 4, Hadith - 970

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ قَالَ حَدَّثَنَا وَكِيعٌ عَنْ مِسْعَرٍ ح و حَدَّثَنَا أَبُو كُرَيْبٍ وَاللَّفْظُ لَهُ قَالَ أَخْبَرَنَا ابْنُ أَبِي زَائِدَةَ عَنْ مِسْعَرٍ حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ الْقِبْطِيَّةِ عَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ كُنَّا إِذَا صَلَّيْنَا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قُلْنَا السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَأَشَارَ بِيَدِهِ إِلَى الْجَانِبَيْنِ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَامَ تُومِئُونَ بِأَيْدِيكُمْ كَأَنَّهَا أَذْنَابُ خَيْلٍ شُمْسٍ إِنَّمَا يَكْفِي أَحَدَكُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يُسَلِّمُ عَلَى أَخِيهِ مَنْ عَلَى يَمِينِهِ وَشِمَالِهِ

It was narrated that Jabir bin Samurah said: "When we prayed with the Messenger of Allah (s.a.w) we used to say (at the completion of prayers): 'As-salamu 'alaikum wa rahmatullah, as-salamu 'alaikum wa rahmatullah (Peace be upon you and the mercy of Allah. Peace be upon you and the mercy of Allah),"' and he gestured with his hand to either side. "The Messenger of Allah (s.a.w) said: 'Why do you gesture with your hands as if they were the tails of restive horses?' Rather it is sufficient for one of you to put his hand on his thigh then say the Salam to his brothers to his right and left."'