Where there are no oxen the manger is clean, but a rich harvest comes by the strength of an ox.
In context
2Whoever walks in uprightness fears Yahweh, but the one whose ways are crooked despises him. 3In the mouth of the senseless is a rod of pride, but the lips of the wise protect them. 4Where there are no oxen the manger is clean, but a rich harvest comes by the strength of an ox. 5A faithful witness does not lie, but a false witness breathes out lies. 6The scoffer looks for wisdom and finds none, but knowledge comes easily to the discerning.
