9:75

And there are some who had made a vow to Allah: “If He gives us from His bounty, we will surely spend in charity and be of the righteous.”
Meaning:-
Vow: a serious promise.
Bounty: a large amount, a generous gift. generosity; liberality, a monetary gift or reward.
Righteous: (of a person or conduct) morally right or justifiable; virtuous, very good; excellent.