John Gill Commentary Proverbs 19:17

"He that hath pity upon the poor lendeth unto Jehovah, And his good deed will he pay him again." — Proverbs 19:17 (ASV)

He that has pity to the poor lendeth to the Lord

A man, whose heart is full of compassion to the poor, and whose hands distribute to their necessities, from a true principle of love and charity to men, and with a view to the glory of God, and not from any selfish principle and with a end; such a man's gift to the poor is a loan to the Lord; it is not cast away upon the creature, but is a "depositum" in the hands of God, and shall be returned with advantage;

and that which he has given will, he pay him again either in this life, in things temporal and spiritual, increasing his worldly substance, blessing his posterity, granting him larger measures of grace, indulging him with his gracious presence, and giving him peace of mind, which passes all understanding; or in the world to come; not as a reward of debt, but of grace; see (Ecclesiastes 11:1Ecclesiastes 11:2) (Matthew 10:42) (25:35) .