When we said prayer with the Messenger of Allah ﷺ, we pronounced: Peace be upon you and Mercy of Allah, peace be upon you and Mercy of Allah, and made gesture with the hand on both the sides. Upon this the Messenger of Allah (may peace be upon him said: What do you point out with your hands as if they are the tails of headstrong horses? This is enough for you that one should place one's hand on one's thigh and then pronounce salutation upon one's brother on the right side and then on the left.  

كُنَّا إِذَا صَلَّيْنَا مَعَ رَسُولِ اللَّهِ ﷺ قُلْنَا السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَأَشَارَ بِيَدِهِ إِلَى الْجَانِبَيْنِ فَقَالَ رَسُولُ اللَّهِ ﷺ عَلاَمَ تُومِئُونَ بِأَيْدِيكُمْ كَأَنَّهَا أَذْنَابُ خَيْلٍ شُمُسٍ إِنَّمَا يَكْفِي أَحَدَكُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يُسَلِّمُ عَلَى أَخِيهِ مَنْ عَلَى يَمِينِهِ وَشِمَالِهِ  

"I heard Jabir bin Samurah say: 'When we prayed behind the Prophet ﷺ we used to say: As-salamu 'alaykum, as-salamu 'alaykum (peace be upon you, peace be upon you)" - and Mis'ar (one of the narrators) pointed with his hand to the right and the left. He ﷺ said: 'What is the matter with these people who wave their hands as if they are the tails of wild horses? It is sufficient for one to place his hands on his thighs and to say the salam to his brother to his right and left."  

سَمِعْتُ جَابِرَ بْنَ سَمُرَةَ يَقُولُ كُنَّا إِذَا صَلَّيْنَا خَلْفَ النَّبِيِّ ﷺ قُلْنَا السَّلاَمُ عَلَيْكُمُ السَّلاَمُ عَلَيْكُمْ وَأَشَارَ مِسْعَرٌ بِيَدِهِ عَنْ يَمِينِهِ وَعَنْ شِمَالِهِ فَقَالَ مَا بَالُ هَؤُلاَءِ الَّذِينَ يَرْمُونَ بِأَيْدِيهِمْ كَأَنَّهَا أَذْنَابُ الْخَيْلِ الشُّمُسِ أَمَا يَكْفِي أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يُسَلِّمُ عَلَى أَخِيهِ عَنْ يَمِينِهِ وَعَنْ شِمَالِهِ  

"We used to pray behind the Messenger of Allah ﷺ and we would greet (others) with our hands. He said: 'What is the matter with those who greet (others) with their hands as if they were tails of wild horses? It is sufficient for any one of you to put his hand on his thigh and say: "As-salamu 'alaikum, as-salamu 'alaikum."  

كُنَّا نُصَلِّي خَلْفَ النَّبِيِّ ﷺ فَنُسَلِّمُ بِأَيْدِينَا فَقَالَ مَا بَالُ هَؤُلاَءِ يُسَلِّمُونَ بِأَيْدِيهِمْ كَأَنَّهَا أَذْنَابُ خَيْلٍ شُمْسٍ أَمَا يَكْفِي أَحَدَهُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يَقُولَ السَّلاَمُ عَلَيْكُمُ السَّلاَمُ عَلَيْكُمْ  

"We used to pray behind the Messenger of Allah ﷺ and we would greet (others) with our hands. He said: 'What is the matter with those who greet (others) with their hands as if they were tails of wild horses? It is sufficient for any one of you to put his hand on his thigh and say: "As-salamu 'alaikum, as-salamu 'alaikum." (Using translation from Nasāʾī 1185)  

كُنَّا نُصَلِّي خَلْفَ النَّبِيَّ ﷺ فَنُسَلِّمُ بِأَيْدِينَا فَقَالَ مَا بَالُ هَؤُلَاءِ يُسَلِّمُونَ بِأَيْدِيهِمْ كَأَنَّهَا أَذْنَابُ خَيْلِ شَمْسٍ إِنَّمَا يَكْفِي أَحَدَكُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يَقُولُ السَّلَامُ عَلَيْكُمُ السَّلَامُ عَلَيْكُمْ  

[Machine] When we used to pray behind the Prophet ﷺ, we would say, by motioning with his index finger, "Assalamu alaikum, assalamu alaikum". Then the Prophet ﷺ said to us, "What is wrong with some people who throw their hands in prayer as if they were the tails of horses? Is it not sufficient for any of you, or for one of you, to place his hand on his thigh, then to greet his brother from his right and left (side)?"  

كُنَّا إِذَا صَلَّيْنَا خَلْفَ النَّبِيِّ ﷺ قُلْنَا يَعْنِي الْإِشَارَةَ بِإِصْبَعِهِ السَّبَابَةِ السَّلَامُ عَلَيْكُمْ السَّلَامُ عَلَيْكُمْ فَقَالَ لَنَا يَعْنِي النَّبِيَّ ﷺ مَا بَالُ أَقْوَامٍ يَرْمُونَ بِأَيْدِيهِمْ فِي الصَّلَاةِ كَأَنَّهَا أَذْنَابُ الْخَيْلِ الشُّمْسِ أَلَا يَكْفِي أَحَدَكُمْ أَوْ أَحَدَهُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يُسَلِّمَ عَلَى أَخِيهِ مِنْ عَنْ يَمِينِهِ وَعَنْ شِمَالِهِ  

"I heard Jabir bin Samurah say: 'When we prayed behind the Prophet ﷺ we used to say: As-salamu 'alaykum, as-salamu 'alaykum (peace be upon you, peace be upon you)" - and Mis'ar (one of the narrators) pointed with his hand to the right and the left. He ﷺ said: 'What is the matter with these people who wave their hands as if they are the tails of wild horses? It is sufficient for one to place his hands on his thighs and to say the salam to his brother to his right and left." (Using translation from Nasāʾī 1318)   

كُنَّا إِذَا صَلَّيْنَا خَلْفَ النَّبِيِّ ﷺ قُلْنَا بِأَيْدِينَا السَّلَامُ عَلَيْكُمْ السَّلَامُ عَلَيْكُمْ فَقَالَ رَسُولُ اللهِ ﷺ مَا بَالُ هَؤُلَاءِ الَّذِينَ يَرْمُونَ بِأَيْدِيهِمْ كَأَنَّهَا أَذْنَابُ الْخَيْلِ الشُّمْسِ أَمَا يَكْفِي أَحَدَكُمْ أَنْ يَضَعَ يَدَهُ عَلَى فَخِذِهِ ثُمَّ يُسَلِّمَ عَلَى أَخِيهِ عَنْ يَمِينِهِ وَشِمَالِهِ  

"مَا بَالُ الَّذِينَ يَرْنونَ (*) بِأَيدِيهم فِي الصَّلاةِ كَأَنَّهَا أَذْنَابُ الْخَيلِ الشُّمْسِ، ألا يَكْفِي أَحَدُكُمْ أن يَضَعَ يَدَهُ عَلَى فَخذِه، ثُمَّ يُسَلِّم عَلَى أَخِيهِ عَن يَمِينِهِ وَشِمَالِهِ".  

"مَا بَالُ هَؤُلاءِ يُسَلِّمُونَ بأَيديهِم كَأَنَّهَا (*) أذْنَابُ خَيلٍ شُمْسٍ، أَمَا يَكْفِي أَحَدَهُمْ أَنْ يَضَع يَدَهُ عَلَى فَخذِه، يَقُولُ: السَّلامُ عَلَيكُمْ، السَّلامُ عَليكُمْ" .  

"عَلامَ تُؤمِنُونَ بأَيديكم؟ كَأنَّهَا أَذنَابُ خَيلٍ شُمْسٍ، وَإِنَّمَا يَكْفى أَحَدَكم أَن يَضَعَ يَدَهُ عَلَى فَخِذهِ ثُمَّ يُسَلِّمُ عَلَى أَخِيهِ. مَن عَلَى يمِينِهِ وَشِمالِهِ".