Deuteronomy 15:10-11

10Thou shalt surely give him, and thine heart shall not be grieved when thou givest unto him: because that for this thing the LORD thy God shall bless thee in all thy work, and in all that thou puttest thine hand unto.

11For the poor shall never cease out of the land: therefore I command thee, saying, Thou shalt surely open thine hand unto thy brother, to thy needy, and to thy poor, in thy land.