2 Kings 2:7
And fifty men of the sons of the prophets went, and stood opposite them afar off. And the two stood by the Jordan.
1 Kings 18:4
for it was so, when Jezebel cut off the prophets of LORD, that Obadiah took a hundred prophets, and hid them by fifties in a cave, and fed them with bread and water.)
1 Kings 18:13
Was it not told my lord what I did when Jezebel killed the prophets of LORD, how I hid a hundred men of LORD's prophets by fifties in a cave, and fed them with bread and water?
2 Kings 2:17
And when they urged him till he was ashamed, he said, Send. Therefore they sent fifty men. And they sought three days, but did not find him.