The Prose Edda
Then said Gangleri: "Where dwelt Ymir, or wherein did he find sustenance?" Hárr answered: "Straightway after the rime dripped, there sprang from it the cow called Audumla; four streams of milk ran from her udders, and she nourished Ymir." Then asked Gangleri: "Wherewithal was the cow nourished?" And Hárr made answer:
"She licked the ice-blocks, which were salty; and the first day that she licked the blocks, there came forth from the blocks in the evening a man's hair; the second day, a man's head; the third day the whole man was there. He is named Búri: he was fair of feature, great and mighty. He begat a son called Borr, who wedded the woman named Bestla, daughter of Bölthorn the giant; and they had three sons: one was Odin, the second Vili, the third Vé. And this is my belief, that he, Odin, with his brothers, must be ruler of heaven and earth; we hold that he must be so called; so is that man called whom we know to be mightiest and most worthy of honor, and ye do well to let him be so called."