“Substance” points to capital, “increase” to revenue. The Septuagint as if to guard against ill-gotten gains being offered as an atonement for the ill-getting, inserts the quaifying words, “honor the Lord from thy righteous labors.”
Related Commentaries of Proverbs 3:9
Proverbs 3:9
9 Honour the LORD with thy substance, and with the firstfruits of all thine increase: