Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah
Narrated Ibn ‘Abbas (Radi-Allahu ‘anhu):
Once the Prophet (Sallallahu ‘Alaihi Wa Sallam) got his blood out (medically) and paid that person who had done it. If it had been illegal, the Prophet (Sallallahu ‘Alaihi Wa Sallam) would not have paid him.
Bukhari Vol. 3 : No. 316