The bad plowman quarrels with his ox.
More Korean Proverbs:
Even a monk can't shave his own head.Korean
Cast not pearls to swine.
Korean
It is a bad plowman that quarrels with his ox.
Korean
The bad calligrapher is choosy about his brushes.
Korean
Even a fish wouldn't get into trouble if it kept its mouth shut.
Korean
No sleep, no dream.
Korean