I know what I have learned is a Danish fairy tale, collected by Svend Grundtvig in Gamle Danske Minder i Folkemunde.
Her husband knocked pieces from his head, so they could make broth, and gave him a sack of gold.
He visited the oldest daughter, and her husband went fishing out in a dough trough.
His wife was angry with him, but he tried to knock pieces from his head for broth and had to take his bed.
Finally, he tried to fish, asking his wife whether his eyes were green; she claimed they were, he jumped in, and she rowed off and left him.