The Prose Edda 1.9

Then said Gangleri: "Much indeed they had accomplished then, methinks, when earth and heaven were made, and the sun and the constellations of heaven were fixed, and division was made of days; now whence come the men that people the world?" And Hárr answered: "When the sons of Borr were walking along the sea-strand, they found two trees, and took up the trees and shaped men of them: the first gave them spirit and life; the second, wit and feeling; the third, form, speech, hearing, and sight. They gave them clothing and names: the male was called Askr, and the female Embla, and of them was mankind begotten, which received a dwelling-place under Midgard. Next they made for themselves in the middle of the world a city which is called Ásgard; men call it Troy. There dwelt the gods and their kindred; and many tidings and tales of it have come to pass both on earth and aloft. There is one abode called Hlidskjálf, and when Allfather sat in the high-seat there, he looked out over the whole world and saw every man's acts, and knew all things which he saw. His wife was called Frigg daughter of Fjörgvinn; and of their blood is come that kindred which we call the races of the Æsir, that have peopled the Elder Ásgard, and those kingdoms which pertain to it; and that is a divine race. For this reason must he be called Allfather: because he is father of all the gods and of men, and of all that was fulfilled of him and of his might. The Earth was his daughter and his wife; on her he begot the first son, which is Ása-Thor: strength and prowess attend him, wherewith he overcometh all living things.