The Prose Edda 1.24

"Njördr in Nóatún begot afterward two children: the son was called Freyr, and the daughter Freyja; they were fair of face and mighty. Freyr is the most renowned of the Æsir; he rules over the rain and the shining of the sun, and therewithal the fruit of the earth; and it is good to call on him for fruitful seasons and peace. He governs also the prosperity of men. But Freyja is the most renowned of the goddesses; she has in heaven the dwelling called Fólkvangr, and wheresoever she rides to the strife, she has one-half of the kill, and Odin half, as is here said:

Fólkvangr 't is called, where Freyja rules Degrees of seats in the hall; Half the kill she keepeth each day, And half Odin hath.

Her hall Sessrúmnir is great and fair. When she goes forth, she drives her cats and sits in a chariot; she is most conformable to man's prayers, and from her name comes the name of honor, Frú, by which noblewomen are called. Songs of love are well-pleasing to her; it is good to call on her for furtherance in love."