But if anyone hates his neighbor and lies in wait for him and attacks him and strikes him fatally so that he dies, and he flees into one of these cities, then the elders of his city shall send and take him from there, and hand him over to the avenger of blood, so that he may die. Your eye shall not pity him, but you shall purge the guilt of innocent blood from Israel, so that it may be well with you. (Deuteronomy 19:11-13)
Let me apply this Scripture by paraphrasing it a bit:
If anyone hates his wife and sets traps for her and attacks her and strikes her so that her health is ruined and over time she sees herself dying, and he runs off to another church, the elders of his first church shall contact the elders of the church to which he has fled and he shall be put out of both churches, handed over to the Lord for the destruction of his flesh. You shall not pity him, but you shall purge your church from him, lest your entire church share in the guilt of innocent blood, so that the Lord will bless you and it might be well with you.
You shall not pity him! To pity him is to keep him in your midst, and in doing so everyone in that church stands guilty before the Lord of the wicked man’s evil! How many churches today are guilty then before the Lord? How many have innocent blood on their hands because they are harboring and enabling the wicked?