לִ֭בּוֹ יָצ֣וּק כְּמוֹ־אָ֑בֶן וְ֝יָצ֗וּק כְּפֶ֣לַח תַּחְתִּֽית׃
His heart is as firm as a stone; yea, firm as the nether millstone.
Read the Targum (classical Aramaic translation) of Job 41:16: Targum Onkelos and other Aramaic renditions, free online, no signup.