And when you bring them not a revelation they say: Why do you not forge it? Say: I only follow what is revealed to me from my Lord; these are clear proofs from your Lord and a guidance and a mercy for a people who believe.

And We have made the night and the day two signs, then We have made the sign of the night to pass away and We have made the sign of the day manifest, so that you may seek grace from your Lord, and that you might know the numbering of years and the reckoning; and We have explained everything with distinctness.