It was narrated from Asma' bint Abi Bakr that she came to the Prophet and said:"O Prophet of Allah, I do not have anything but that which Az-Zubair brings to me. Is there any sin on me if I give a small amount of that which he brings to me?" He said: Give whatever you can, and do not withhold what you have, lest Allah withhold provision from you

English translation · Sunan an-Nasa'i