Matthew 5:37-38

But let your statement be, ‘Yes, yes’ or ‘No, no’ [a firm yes or no]; anything more than that comes from the evil one. [Lev 19:12; Num 30:2; Deut 23:21] “You have heard that it was said, ‘AN EYE FOR AN EYE, AND A TOOTH FOR A TOOTH [punishment that fits the offense].’ [Ex 21:24; Lev 24:20; Deut 19:21]