Brother Jonah is called to duty, but is reluctant and goes to sea; the winds begin to blow, and the whale swallows him. The whale feels ill, and eventually throws Jonah up. Refrain: "Yessir, the whale he swallowed Brother Jon-oh. Oh! Brother! Jon-oh!"
The story of Jonah and his travels is, of course, the subject of the Biblical book of Jonah. The Bible, however, consistently calls the sea creature that swallowed him a "fish." - RBW