My LORD’s BibleApostolic Constitutions, Book VI 4
1If therefore God inflicted punishment immediately on those that made a schism on account of their ambition, how much rather will He do it upon those who are the leaders of impious heresies! Will not He inflict severer punishment on those that blaspheme His providence or His creation? But you, brethren, who are instructed out of the Scripture, should take care not to make divisions in opinion, nor divisions in unity. For those who set up unlawful opinions are marks of perdition to the people. In like manner, you of the laity should not come near to such as advance doctrines contrary to the mind of God; nor should you be partakers of their impiety. For says God: Separate yourselves from the midst of these men, lest you perish together with them. And again: Depart from the midst of them, and separate yourselves, says the Lord, and touch not the unclean thing, and I will receive you.