And We divided them into twelve tribes, as separate communities, and We revealed to Musa when his people asked him for water, .Strike the rock with your staff. Then twelve springs gushed forth from it. Each tribe came to know their drinking place. We shaded them with the shadow of the clouds. And We sent down to them Mann and Salwa (saying), .Eat of the good things we have provided you. And they did us no harm, rather they have been harming their own selves.