What does 1 Kings 18:13 mean?

Didn't anyone tell you, my master, what I did when Jezebel was killing the Lord's prophets? I hid a hundred of them in two caves, fifty in each, and brought them food and water. 1 Kings 18:13 - Modern Text Bible

(Obadiah tries to show Elijah that he's on God's side, risking his life to protect God's prophets from Jezebel.)