What did Jonah tell the sailors to do to calm the sea?

Answer: Throw him into the sea

Jonah said, "Pick me up and cast me into the sea," knowing the storm was his fault. When they did, the sea grew calm.

““Pick me up,” he answered, “and cast me into the sea, so it may quiet down for you. For I know that I am to blame for this violent storm that has come upon you.””— Jonah 1:12 (BSB)