The guard grabbed Loki with one hand and brought him down to the giant Geirrod. Geirrod looked into the eyes of the falcon, and he suspected it was a person, so he demanded that he revealed who he was. But Loki remained silent.
Annoyed at the falcon, Geirrod opened up a chest and threw Loki into it and locked it. After having been locked up in the chest for three long months, Geirrod finally opened it again. He lifted the falcon out again and asked again, who are you? Loki who was now starving told him who he was.
The giant released Loki, but only if he swore that he would find a way to bring Thor to his home without any of his weapons, Loki promised that he would.
Loki went back to Asgard, and he managed to convince Thor to travel with him to Geirrod’s courts without any weapons. Because it was such a long way, Thor and Loki stayed for the night at the giantess named Grid, she is the mother of Vidar the silent.
When Loki fell asleep, Grid told Thor about Geirrod and how cunning and dangerous he was. Grid lent Thor a belt of strength, a par of iron gloves and her staff called Gridarvol (which means Grid’s staff)