Well of Urd

In Norse Mythology the well in Asgard which fed one of the roots of the Yggdrasil. Also near the well in a hall are three Norns (or Nornir) that tend the well - Urd, Verdandi, and Skuld, personifications of fate. They engrave the fate of all humans onto the trunk of the Yggdrasil and attend to the needs of the tree.