Deuteronomy 25:12

וקצת את כפה THEN THOU SHALT HEW OFF HER HAND — i.e., she must pay money that is the equivalent of the shame to which he has been put (Bava Kamma 28a), all according to the social position of the person who put him to shame and of him who was shamed (Bava Kamma 83b). But perhaps this is not the meaning, but that you should cut off her hand, literally?! It states, however, here לא תחוס, “thine eye shall not pity her” and it states there (Deuteronomy 19:21) in the laws concerning the plotting witnesses “thou shalt not pity them”; now, what is the case there? It is monetary compensation (see Rashi on that passage)! So, too, monetary compensation is here intended (Sifrei Devarim 293:2).

וְקַצֹּתָ֖ה אֶת־כַּפָּ֑הּ לֹ֥א תָח֖וֹס עֵינֶֽךָ׃ {ס}        

then thou shalt cut off her hand, thy eye shall not pity her.