Solomon
Proverbs 14:4ESV·traditional attribution

Where there are no oxen, the manger is clean, but abundant crops come by the strength of the ox.

Matthew Henry Presbyterian

Note, 1. The neglect of husbandry is the way to poverty: Where no oxen are, to till the ground and tread out the corn, the crib is empty, is clean; there is no straw for the cattle, and consequently no bread for the service of man. Scarcity is represented by cleanness of teeth, Amo 4:6.

John Gill Reformed Baptist

Where no oxen are the crib is clean,.... Or "empty" (z), so Jarchi and Aben Ezra. Oxen were used in Judea in several parts of husbandry; in ploughing the land, bringing home the corn, and in threshing or treading it out, Deu 22:10.

Jamieson-Fausset-Brown Reformed

crib is clean--empty; so "cleanness of teeth" denotes want of food (compare Amo 4:6). Men get the proper fruit of their doings (Gal 6:7).