Bede

Lame in his feet and drinking iniquity, etc. It may happen that any wise person sends a fool on a mission, not knowing that he is a fool; yet he does not lose the glory of his wisdom, since he believed in the good from the unknown, which he had heard. But he who knowingly sends a heretic to preach to the people is lame in his feet and drinks iniquity, because he has lost both the outward walk of good work and the inner sense, being drunk on foolishness.

Commentary on Proverbs ↗