The Prose Edda 2.6

"How should one periphrase Njördr? By calling him God of the Vanir, or Kinsman of the Vanir, or Wane, Father of Freyr and Freyja, God of Wealth-Bestowal.

So says Thórdr Sjáreksson:

Gudrun's self by ill Her sons did kill; The wise God-bride At the Wane's side Grieved; men tell Odin tamed steeds well; 'T was not the saying Hamdir spared sword-playing.

Here it is recorded that Skadi departed from Njördr, as has already been written.