Leviticus 26:25

נקם ברית [AND I WILL BRING UPON YOU A SWORD AVENGING] THE VENGEANCE OF THE COVENANT — Scripture speaks of “the vengeance of the covenant” because there is vengeance which is not mentioned in “The Covenant” (i. e. in this chapter of Scripture) being in the manner of other acts of vengeance (i. e. like the barbarous acts of revenge that are customary among other peoples, but which are not threatened in the Torah), and such a one was the blinding of the eyes of king Zedekiah (Sifra, Bechukotai, Chapter 6 1; cf. 2 Kings 25:7). Another explanation of נקם ברית is that it means vengeance for My covenant which you have transgressed. Wherever “bringing of the sword” is mentioned in Scripture it signifies a war waged by the enemies’ armies. ונאספתם AND YE SHALL GATHER YOURSELVES from outside (from the open country) WITHIN YOUR CITIES on account of the state of siege (Sifra, Bechukotai, Chapter 6 1). ושלחתי דבר בתוככם AND I WILL SEND THE PESTILENCE AMONG YOU, and through the pestilence it will happen, ונתתם ביד THAT YOU WILL BE GIVEN INTO THE HAND of the enemies who besiege you. This is because no corpse was permitted to remain in Jerusalem over night, and therefore when they would carry the corpse out of the city to bury it they would be given (they would fall) into the hands of their enemies (Sifra, Bechukotai, Chapter 6 1).

וְהֵבֵאתִ֨י עֲלֵיכֶ֜ם חֶ֗רֶב נֹקֶ֙מֶת֙ נְקַם־בְּרִ֔ית וְנֶאֱסַפְתֶּ֖ם אֶל־עָרֵיכֶ֑ם וְשִׁלַּ֤חְתִּי דֶ֙בֶר֙ בְּת֣וֹכְכֶ֔ם וְנִתַּתֶּ֖ם בְּיַד־אוֹיֵֽב׃

And I will bring a sword upon you, that shall avenge my covenant: and when you are gathered together within your cities, I will send the pestilence among you; and you shall be delivered into the hand of the enemy.