Matthew Poole and continuators on Proverbs 21:20

20 There is a treasure to be desired, and oil in the dwelling of the wise: but a foolish man spendeth it up.

Wise-men lay up all necessary and desirable treasures for their own use, and for their Children, and Families. Oil is particularly mentioned, partly because that was a considerable part of their Wealth and Treasures in those Countries, of which see Deut. 7. 13. & 28. 40, 51. Iudg. 9. 9. Mic. 6. 15. &c. and partly to shew that his Providence reached not only to necessaries, but even to matters of just and lawful delight.

Marginal references: Psal. 112. 3.