In The Days of Giants A Book of Norse Tales
Page: 79"Ho there, river Vimer! Do not grow any larger, I pray. It is of no use. The more you crowd upon me, the mightier I grow with my belt and my staff!"
But lo! as he nearly reached the other side, Thor spied some one hiding close down by the bank of the river. It was Gialp of the red eyes, the big elder daughter of Geirröd. She was splashing the water upon Thor, making the great waves that rolled up and threatened to drown him.
"Oho!" cried he. "So it is you who are making the river rise, big little girl. We must see to that;" and seizing a huge boulder, he hurled it at her. It hit her with a thud, for Thor's aim never missed. Giving a scream as loud as a steam-whistle, Gialp limped home as best she could to tell her father, and to prepare a warm reception for the stranger who bore Loki at his back.