The quarrel of my covenant, i.e. my quarrel with you for your breach of your faith and covenant made with me. Into the hand of the enemy; because those few that shall be left of the pestilence will be unable to defend you in your cities or strong holds.
Related Commentaries of Leviticus 26:25
Leviticus 26:25
25 And I will bring a sword upon you, that shall avenge the quarrel of my covenant: and when ye are gathered together within your cities, I will send the pestilence among you; and ye shall be delivered into the hand of the enemy.