Bede, on Prov 18:13

“He that answereth before he heareth sheweth himself to be a fool, and worthy of confusion.”

“He who answers before he hears, etc. He who wants to be a teacher before he learns does not avoid the fault of foolishness. He who judges the deeds of his neighbors before he fully understands the cause of both parties hastily acts improperly, and he shows himself worthy of confusion.”

Imported from an open dataset — not yet checked against the printed edition.