Unknown Author
Job 2:4ESV·author unknown

Then Satan answered the LORD and said, “Skin for skin! All that a man has he will give for his life.

Matthew Henry Presbyterian @wholebiblehenry

Satan, that sworn enemy to God and all good men, is here pushing forward his malicious prosecution of Job, whom he hated because God loved him, and did all he could to separate between him and his God, to sow discord and make mischief between them, urging God to afflict him and then urging him to blaspheme God.

Commenting on Job 2:1-6

John Gill Reformed Baptist @doctorgill

But put forth thine hand now, and touch his bone and his flesh,.... That is, his body, which consisted of flesh and bones; these are the constituent parts of the body, and which distinguish it from spirit, Luk 24:39; this is the motion made by Satan for a second trial of Job's integrity; he moves that God would take off his hand of providence over...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Skin for skin--a proverb. Supply, "He will give." The "skin" is figurative for any outward good. Nothing outward is so dear that a man will not exchange it for some other outward good; "but" (not "yea") "life," the inward good, cannot be replaced; a man will sacrifice everything else for its sake.