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 @wholebiblehenry

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 @doctorgill

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 @jfbcommentary

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).