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 it was so, when Jezebel cut off the prophets of Yahweh, 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 Yahweh, how I hid one hundred men of Yahweh'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 didn't find him.

Treasury of Scripture Knowledge

Summary

And fifty men of the sons of the prophets went, and stood to view afar off: and they two stood by Jordan.

Bible References

Fifty men

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 didn't find him.
1 Kings 18:4
for it was so, when Jezebel cut off the prophets of Yahweh, that Obadiah took one hundred prophets, and hid them by fifty in a cave, and fed them with bread and water.)