Narrated Ibn `Abbas: Once the Prophet got his blood out (medically) and paid that person who had done it. If it had been illegal, the Prophet would not have paid him.
Hadith ReferenceSahih Bukhari / The Book of Sales (Bargains) / Hadith: 2103
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة