Moses
Deuteronomy 15:11BSB·traditional attribution

For there will never cease to be poor in the land; that is why I am commanding you to open wide your hand to your brother and to the poor and needy in your land.

John Calvin Reformed @genevareformer

11. For the poor shall never cease out of the land. The notion “I know that ye will not obey me with a perfect heart, and therefore my blessing shall be lessened towards you, and there shall be poor among you.” Hebrew commentators quoted in Munster and Fagius. — Poole’s Syn.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A law for the relief of poor debtors, such (we may suppose) as were insolvent. Every seventh year was a year of release, in which the ground rested from being tilled and servants were discharged from their services; and, among other acts of grace, this was one, that those who had borrowed money, and had not been able to pay it before...

Commenting on Deuteronomy 15:1-11

John Gill Reformed Baptist @doctorgill

For the poor shall never cease out of the land,.... There would be always such objects to exercise their charity and beneficence towards, Joh 12:8, which is no contradiction to Deu 15:4 for had they been obedient to the laws of God, they would have been so blessed that there would have been none; so the Targums; but he foresaw that they would not keep...