KJV - His heart is as firm as a stone; yea, as hard as a piece of the nether millstone.

ASV - His heart is as firm as a stone; Yea, firm as the nether millstone.

BBE - His heart is as strong as a stone, hard as the lower crushing-stone.

WEB - His heart is as firm as a stone, Yes, firm as the lower millstone.

YLT - His heart `is' firm as a stone, Yea, firm as the lower piece.

Notes