And to Madyan (We sent) their brother Shu'aib. He said: O my people! serve Allah, you have no god other than Him; clear proof indeed has come to you from your Lord, therefore give full measure and weight and do not diminish to men their things, and do not make mischief in the land after its reform; this is better for you if you are believers:

And (as for) those who disbelieve, their deeds are like the mirage in a desert, which the thirsty man deems to be water; until when he comes to it he finds it to be naught, and there he finds Allah, so He pays back to him his reckoning in full; and Allah is quick in reckoning;