al-Husain bin Hryth الحسين بن حريث · The Book of Zakah

"I heard the Messenger of Allah say: 'Allah, the Mighty and Sublime, does not accept prayer without purification or charity from Ghulul."

some of the Ansar asked the Messenger of Allah (for help) and he gave them (something). Then they asked him and he gave them, then when he had ran out he said: "Whatever I have of good, I will never keep it from you, but whoever wants to refrain from asking, Allah, the Mighty and Sublime, will help him to do so, and whoever wants to be patient, Allah will help him to be patient. None is ever given anything…