Here "accept discipline" represents learning from discipline. Alternate translation: "They refused to learn from discipline" or "When I disciplined them, they refused to learn to obey me" (See: [[rc://en/ta/man/translate/figs-metaphor]])
God speaks of the people of Israel killing the prophets as if their sword were a lion that ate the prophets. Alternate translation: "You have killed the prophets brutally with your sword like a destructive lion" (See: [[rc://en/ta/man/translate/figs-metaphor]])