Sunan Abi Dawud

Ibn ‘Abbas reported the Messenger of Allah (May peace be upon him) as saying:If anyone asks you refuge for Allah’s sake give him refuge; and if anyone asks you (for something) for Allah’s sake, give him. Sahl and Sulaiman said: if anyone calls you, respond to him. The Agreed version goes; if you do not afford to compensate him, pray Allah for him until you know that you have compensated him