Deuteronomy 19:21

19:21 You must not show pity; the principle will be a life for a life, an eye for an eye, a tooth for a tooth, a hand for a hand, and a foot for a foot. ¹ 

Matthew 5:38

Retaliation

5:38 “You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ ² 

Matthew 7:2

7:2 For by the standard you judge you will be judged, and the measure you use will be the measure you receive. ³ 

[19:21]  ¹ sn This kind of justice is commonly called lex talionis or “measure for measure” (cf. Exod 21:23-25; Lev 24:19-20). It is likely that it is the principle that is important and not always a strict application. That is, the punishment should fit the crime and it may do so by the payment of fines or other suitable and equitable compensation (cf. Exod 22:21; Num 35:31). See T. S. Frymer-Kensky, “Tit for Tat: The Principle of Equal Retribution in Near Eastern and Biblical Law,” BA 43 (1980): 230-34.

[5:38]  ² sn A quotation from Exod 21:24; Lev 24:20.

[7:2]  ³ tn Grk “by [the measure] with which you measure it will be measured to you.”