البقرة

Indeed, in the creation of the heavens and earth; the alternation of the night and day; the sailing of the ships in the sea for the benefit of people; the sending down of rain from the sky by Allah, reviving thereby the earth after its death; the spreading of all kinds of creatures therein; the directing of the winds and clouds between the sky and earth – in all these, there are signs[71] for people of understanding.

[71] There are two āyāt (signs) leading to belief: Quranic verses and cosmic signs. The signs meant in this verse are cosmic.