I went out with the Prophet ﷺ on the expedition of hardship, and it was among the deeds I trusted most in myself. I had a hired worker with me who got into a fight with another man. One of them bit the other's finger, and the other pulled his finger out, knocking out the biter's front tooth, which fell to the ground.The man went to the Prophet ﷺ, but he disregarded the loss of his tooth and said, "Should he leave his finger in your mouth for you to chew on" — I think he said — "the way a stallion chews?"
غزوت مع النبي ﷺ جيش العسرة، فكان من أوثق أعمالي في نفسي، فكان لي أجير، فقاتل إنسانا، فعض أحدهما إصبع صاحبه، فانتزع إصبعه، فأندر ثنيته، فسقطت، فانطلق إلى النبي ﷺ، فأهد را ثنيته، وقال: أ فيدع إصبعه في فيك تقضمها- قال: أحسبه قال:- كما يقضم الفحل.
Bukhari narrated it in the Book of Hiring (2265), and Muslim in the Book of Qasama (1674:23), both through the route of Ibn Jurayj, who said, "Ataa informed me, Safwan bin Yaala bin Umaya informed me, from his father." The wording given here is Bukhari's.