Say thou: O mankind! verily I am the apostle of Allah unto you all - of Him whose is the dominion of the heavens and the earth. No god is there but He; He giveth life and causeth to die. Believe then in Allah and His prophet, the unlettered prophet, who believeth in Allah and His words, and follow him that haply ye may be guided. 158 Among the people of Moses are some whose guidance and Judgment are based on the Truth. 159 And We divided them into twelve tribes, as separate groups; and when his people asked him for water, We revealed to Moosa, “Strike the rock with your staff”; so twelve springs gushed forth from it; each group recognised its drinking-place; and We made the clouds a canopy over them and sent down the Manna and the Salwa (birds) on them; “Eat of the good things we have provided you”; and they did not wrong Us in the least, but they used to wrong themselves. 160 And when it was said to them, 'Dwell in this township and eat of it wherever you will; and say, Unburdening; and enter in at the gate, prostrating; We will forgive you your transgressions, and increase the good-doers.' 161 But those who wronged among them changed [the words] to a statement other than that which had been said to them. So We sent upon them a punishment from the sky for the wrong that they were doing. 162