Leviticus 19:18; Leviticus 26:25

18 'You shall not take vengeance, nor bear any grudge against the sons of your people, but you shall love your neighbor as yourself; I am the LORD .

25 'I will also bring upon you a sword which will execute vengeance for the covenant; and when you gather together into your cities, I will send pestilence among you, so that you shall be delivered into enemy hands.