Overall meaning : Say to the unbelieving idolaters, Muhammad, ‘Just think: whether Allah destroys me and all the believers with me or has mercy upon us, who will protect you from His painful punishment if you persist in disbelieving in Him?!’ Say to them, ‘He is our Lord, the All-Compassionate God. We believe in Him, and in Him alone we put our trust. You will soon know, when the punishment comes, which of us has strayed from the truth!’
Say to them, ‘Just think: if all the water that you have were to sink down into the ground, who would bring you pure water flowing over the face of the earth?!’