Charles Ellicott Commentary Job 16:15

"I have sewed sackcloth upon my skin, And have laid my horn in the dust." — Job 16:15 (ASV)

I have sewed sackcloth upon my skin. — Referring, probably, to the state of his skin, which had become hard and rugged as sackcloth. As the second half of the verse must be figurative, there seems to be no reason to understand the first half otherwise.