Musnad Ahmad 1674

It was narrated from ʻUmar bin Abi Salamah , that his father said: The preacher of the people of Palestine told me: I heard ‘AbdurRahman bin ‘Awf say: The Messenger of Allah (ﷺ) said: “By the One in Whose hand is the soul of Muhammad, there are three things which I could certainly swear an oath about: no wealth decreases because of charity, so give in charity; no one forgives a wrong done to him, seeking thereby the Countenance of Allah, but Allah will raise him in status thereby - Abu Sa"eed the freed slave of Banu Hashim said: but Allah will increase him in honour thereby - on the Day of Resurrection; and no one starts asking of people but Allah will increase him in poverty.”