Berean Standard Bible (BSB)
The waters rose and covered the mountaintops to a depth of fifteen cubits.
World English Bible (WEB)
The waters prevailed fifteen cubits upward, and the mountains were covered.
Strong's King James
Fifteen{H6240}{H2568} cubits{H520} upward{H4605} did the waters{H4325} prevail{H1396}{(H8804)}; and the mountains{H2022} were covered{H3680}{(H8792)}.
The F.O.G *
The F.O.G Message *
Young's Literal Translation
fifteen cubits upwards have the waters become mighty, and the mountains are covered;