Excess is treated in these verses from several angles: in spending, where the right course lies between waste and stinginess, and also in matters other than wealth. They recall that Allah does not like those who commit excess, call the extravagant a brother of Satan, and announce the evil end of the excessive in this world and the Hereafter.
Verses gathered from a topical index of the Quran, in Mushaf order; every verse is quoted in full.
And their words were not but that they said, "Our Lord, forgive us our sins and the excess [committed] in our affairs and plant firmly our feet and give us victory over the disbelieving people."
And when affliction touches man, he calls upon Us, whether lying on his side or sitting or standing; but when We remove from him his affliction, he continues [in disobedience] as if he had never called upon Us to [remove] an affliction that touched him. Thus is made pleasing to the transgressors that which they have been doing.
And thus do We recompense he who transgressed and did not believe in the signs of his Lord. And the punishment of the Hereafter is more severe and more enduring.
They said, "Indeed, we consider you a bad omen. If you do not desist, we will surely stone you, and there will surely touch you, from us, a painful punishment."