It was narrated from Anas that the Prophet ( ﷺ took the hem of his garment and spat on it, rubbed it together briefly and let it drop.  

أَنَّ النَّبِيَّ ﷺ أَخَذَ طَرَفَ رِدَائِهِ فَبَصَقَ فِيهِ فَرَدَّ بَعْضَهُ عَلَى بَعْضٍ  

"When any one of you prays, let him not spit in front of him or to his right, rather let him spit to his left or beneath his feet." Then the Prophet ﷺ spat like this on his garment and rubbed it.  

عَنِ النَّبِيِّ ﷺ قَالَ إِذَا صَلَّى أَحَدُكُمْ فَلاَ يَبْزُقْ بَيْنَ يَدَيْهِ وَلاَ عَنْ يَمِينِهِ وَلَكِنْ عَنْ يَسَارِهِ أَوْ تَحْتَ قَدَمِهِ وَإِلاَّ فَبَزَقَ النَّبِيُّ ﷺ هَكَذَا فِي ثَوْبِهِ وَدَلَكَهُ