(30:33) And when adversity touches the people, they call upon their Lord, turning in repentance to Him. Then when He lets them taste mercy from Him, at once a party of them associate others with their Lord, (30:34) So that they will deny what We have granted them. Then enjoy yourselves, for you are going to know. (30:35) Or have We sent down to them an authority, and it speaks of what they were associating with Him? (30:36) And when We let the people taste mercy, they rejoice therein, but if evil afflicts them for what their hands have put forth, immediately they despair. (30:37) Do they not see that Allah extends provision for whom He wills and restricts [it]? Indeed, in that are signs for a people who believe. (30:38) So give the relative his right, as well as the needy and the traveler. That is best for those who desire the countenance of Allah, and it is they who will be the successful. (30:39) And whatever you give for interest to increase within the wealth of people will not increase with Allah. But what you give in zakah, desiring the countenance of Allah - those are the multipliers.