She went straight way to Heimdal, who guarded the rainbow bridge.
Bifrost, which was the name of the bridge, was the only path which led from Asgard to the earth.
Heimdal allowed only those who lived in the plain to pass over it.
All feared Heimdal, yet they loved him.
He could see to the ends of the world.
He could hear the wool growing on the sheep’s back, and knew when each grass blade broke into the sunshine.
Heimdal loved Balder and when he heard what troubled Frigga, pitied her. He gave her his swift black horse and showed her the way to the ends of the earth.
For nine days and nights she traveled without food or rest.
She asked everything she met to promise not to harm Balder.
Animals, flowers, trees, water, air, fire, everything she asked gladly gave the promise.