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