2 Kings 2:7
Fifty men of the sons of the prophets went, and stood opposite them at a distance; and they both stood by the Jordan.
1 Kings 18:4
For so it was, when Jezebel cut off the prophets of the LORD, that Obadiah took one hundred prophets, and hid them by fifty in a cave, and fed them with bread and water.)
1 Kings 18:13
Wasn't it told my lord what I did when Jezebel killed the prophets of the LORD, how I hid one hundred men of the LORD's prophets with fifty to a cave, and fed them with bread and water?
2 Kings 2:17
When they urged him until he was ashamed, he said, "Send them." They sent therefore fifty men; and they searched for three days, but did not find him.