חֲמֵ֨שׁ עֶשְׂרֵ֤ה אַמָּה֙ מִלְמַ֔עְלָה גָּבְר֖וּ הַמָּ֑יִם וַיְכֻסּ֖וּ הֶהָרִֽים׃
Fifteen cubits upward did the waters prevail; and the mountains were covered.
Read kabbalistic (mystical) interpretation of Genesis 7:20: and classical mystical sources.