Deuteronomy 22:29
Then the man who slept with her must pay the young woman's father fifty shekels of silver. She must become his wife, because he took her by force. He must never divorce her as long as he lives.
Deuteronomy 22:29, Readable English Bible (READ)
Note: Fifty shekels is about 1.25 pounds (570 grams) of silver.