Such being their state, We raised them up so they began to ask one another. One who spoke said: "How long have you stayed?" They (some among them) answered: "We have stayed a day, or part of a day." The others said: "Your Lord knows better how long you have stayed. Now (we must deal with our hunger. So) send one of you to the city with this coin of yours: let him see what food is most pure there (and so lawful), and bring a supply from it. But let him behave with utmost care and guarded courtesy and by no means make anyone aware of you.