Abu Taiba cupped Messenger of Allah ﷺ so he ordered that he be paid one Sa of dates and ordered his masters to reduce his tax (as he was a slave and had to pay a tax to them).  

حَجَمَ أَبُو طَيْبَةَ رَسُولَ اللَّهِ ﷺ فَأَمَرَ لَهُ بِصَاعٍ مِنْ تَمْرٍ وَأَمَرَ أَهْلَهُ أَنْ يُخَفِّفُوا مِنْ خَرَاجِهِ  

Once the Prophet ﷺ got his blood out (medically) and paid that person who had done it. If it had been illegal, the Prophet ﷺ would not have paid him.  

احْتَجَمَ النَّبِيُّ ﷺ وَأَعْطَى الَّذِي حَجَمَهُ وَلَوْ كَانَ حَرَامًا لَمْ يُعْطِهِ