The Messenger of Allah ﷺ spat on his clothe and scrubbed with a part of it.  

بَزَقَ رَسُولُ اللَّهِ ﷺ فِي ثَوْبِهِ وَحَكَّ بَعْضَهُ بِبَعْضٍ  

A similar tradition has also been narrated by Anas from the Prophet ﷺ through a different chain of narrators.  

عَنِ النَّبِيِّ ﷺ بِمِثْلِهِ