He also said—may Allah have mercy on him:

In the two Sahīhs, Abū Mūsā reports that the Prophet, may Allah bless him and grant him peace, said:

“Every Muslim must give charity.”
He was asked, “What if he has nothing to give?”
He replied, “He should work with his own hands, benefiting himself and giving charity.”
He was asked, “What if he is unable to do so?”
He replied, “He should help someone in need and distress.”
He was asked, “What if he is unable to do so?”
He replied, “He should enjoin what is right or good.”
He was asked, “What if he does not do that?”
He replied, “He should refrain from evil, for that is charity.”

The two Sahīhs also report that Abū Dharr said:

“I asked, ‘Messenger of Allah, which deeds are best?’
He replied, ‘Faith in Allah and striving in His cause.’
I asked, ‘Which slaves are best to free?’
He replied, ‘Those most prized by their owners and highest in price.’
I asked, ‘What if I do not do that?’
He replied, ‘Help a craftsman, or do work for someone who lacks the skill.’
I asked, ‘Messenger of Allah, what if I am too weak to perform some of these deeds?’
He replied, ‘Refrain from harming people, for that is charity you give on your own behalf.’”

In this hadith, he made charity obligatory upon every Muslim and set out five levels as alternatives to one another. The first is to give charity from one’s wealth; if one has none, one should earn money