Jewish Publication Society of America Version (JPS1917) - Job 18:13 >

It shall devour the members of his body, yea, the first-born of death shall devour his members.

King James Version (KJV) - Job 18:13 >

It shall devour the strength of his skin: [even] the firstborn of death shall devour his strength.

Berean Study Bible (BSB) - Job 18:13 >

It devours patches of his skin; the firstborn of death devours his limbs.