John Gill Commentary Job 31:9

"If my heart hath been enticed unto a woman, And I have laid wait at my neighbor`s door;" — Job 31:9 (ASV)

If my heart has been deceived by a woman
By another man's wife, by wantonly looking at her beauty, and so lusting after her.

And so, not through any blame or fault of hers, or by any artful methods used by her, to allure and ensnare; such as were practised by the harlot, (Proverbs 7:1–27).

But by neither was the heart of Job deceived, and drawn into the sin of uncleanness; for he had made a covenant with his eyes, as not to look at a virgin, so much less at another man's wife, to prevent his lusting after her; and whatever temptations and solicitations he might have been attended with, through the grace of God, as Joseph was, he was enabled to withstand them.

Though as wise a man, and the wisest of men, has his heart deceived and drawn aside thereby, (Ecclesiastes 7:26).

or [if] I have laid wait at my neighbour's door :
to meet with his wife there, and carry on an intrigue with her; or to take the opportunity of going in when opened, in order to solicit her to his embraces, knowing her husband to be away from home; see (Proverbs 5:8) (Proverbs 7:8Proverbs 7:19) .