וַחֲמִשִּׁ֨ים אִ֜ישׁ מִבְּנֵ֤י הַנְּבִיאִים֙ הָֽלְכ֔וּ וַיַּעַמְד֥וּ מִנֶּ֖גֶד מֵרָח֑וֹק וּשְׁנֵיהֶ֖ם עָמְד֥וּ עַל־הַיַּרְדֵּֽן׃
And fifty men of the sons of the prophets went, and stood over against them afar off; and they two stood by the Jordan.
Read kabbalistic (mystical) interpretation of II Kings 2:7: and classical mystical sources.