Albert Barnes Commentary Job 31:2

"For what is the portion from God above, And the heritage from the Almighty on high?" — Job 31:2 (ASV)

For what portion of God is there from above? - Or, rather, “What portion should I then have from God who reigns above?” Job asks with emphasis, what portion or reward he should expect from God who reigns on high, if he had not made such a covenant with his eyes, and if he had given the reins to loose and wanton thoughts? This question he himself answers in the following verse, and says, that he could have expected only destruction from the Almighty.