3 Nor let the people flatter themselves that they can be free from the contagion of sin, while communicating with a priest who is a sinner, and yielding their consent to the unjust and unlawful episcopacy of their overseer, when the divine reproof by Hosea the prophet threatens, and says, “Their sacrifices shall be as the bread of mourning; all that eat thereof shall be polluted;” teaching manifestly and showing that all are absolutely bound to the sin who have been contaminated by the sacrifice of a profane and unrighteous priest.
Which, moreover, we find to be manifested also in Numbers, when Korah, and Dathan, and Abiram Claimed for themselves the power of sacrificing in opposition to Aaron the priest. There also the Lord commanded by Moses that the people should be separated from them, lest, being associated with the wicked, themselves also should be bound closely in the same wickedness. “Separate yourselves,” said He, “from the tents of these wicked and hardened men, and touch not those things which belong to them, lest you perish together in their sins.” On which account a people obedient to the Lord's precepts, and fearing God, ought to separate themselves from a sinful prelate, and not to associate themselves with the sacrifices of a sacrilegious priest, especially since they themselves have the power either of choosing worthy priests, or of rejecting unworthy ones.
Source: The Epistles of Cyprian (New Advent)