John Gill Commentary Psalms 112:3

"Wealth and riches are in his house; And his righteousness endureth for ever." — Psalms 112:3 (ASV)

Wealth and riches shall be in his house
In his family; if not possessed by him, yet by his posterity: though rather this signifies spiritual riches, the riches of grace, the unsearchable riches of Christ, durable riches and righteousness; seeing it is connected with an everlasting righteousness, as in the next clause.

And his righteousness endureth for ever ;
he is not hurt by his temporal riches, as others are, the prodigal, the covetous, and formal professor; he continues the good and righteous man he was, notwithstanding his riches. Some understand this of his liberality with his riches, as alms deeds are sometimes called righteousness; see (Psalms 112:9) (Matthew 6:1) though it rather intends either inherent righteousness, the new man which is created in righteousness, the inward principle of grace which always continues; or the righteousness of Christ imputed to him, which is an everlasting one.