Babylonian Enuma Elish

myth:babylonian_enuma_elish

Apsu the fresh water and Tiamat the salt sea mingle and beget the gods; but when the young gods grow loud, the sea-dragon Tiamat makes war on them. Marduk slays her, and splits her enormous body to make the dome of the sky and the floor of the earth, setting the stars in their stations and the year in its courses. — Babylonian myth (Enuma Elish)