Deuteronomy 15:10-11

10Thou shalt surely give him, and thy heart shall not be grieved when thou givest unto him; because that for this thing Jehovah thy God will bless thee in all thy work, and in all that thou puttest thy hand unto. 11For the poor will never cease out of the land: therefore I command thee, saying, Thou shalt surely open thy hand unto thy brother, to thy needy, and to thy poor, in thy land.