Sahih Muslim Book - 4, Hadith - 971

و حَدَّثَنَا الْقَاسِمُ بْنُ زَكَرِيَّاءَ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى عَنْ إِسْرَائِيلَ عَنْ فُرَاتٍ يَعْنِي الْقَزَّازَ عَنْ عُبَيْدِ اللَّهِ عَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ صَلَّيْتُ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَكُنَّا إِذَا سَلَّمْنَا قُلْنَا بِأَيْدِينَا السَّلَامُ عَلَيْكُمْ السَّلَامُ عَلَيْكُمْ فَنَظَرَ إِلَيْنَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ مَا شَأْنُكُمْ تُشِيرُونَ بِأَيْدِيكُمْ كَأَنَّهَا أَذْنَابُ خَيْلٍ شُمْسٍ إِذَا سَلَّمَ أَحَدُكُمْ فَلْيَلْتَفِتْ إِلَى صَاحِبِهِ وَلَا يُومِئْ بِيَدِهِ.

It was narrated that Jabir bin Samurah said: "I prayed with the Messenger of Allah (s.a.w) and when we said the Salam, we used to gesture with our hands - 'As-salamu 'alaikum, As-salamu 'alaikum.' The Messenger of Allah (s.a.w) looked at us and said: 'What is the matter with you? You are gesturing with your hands as if they were the tails of restless horses. When one of you says the Salam, let him tum to his companion i.e., the one next in row) and not gesture with his hand."'