Job 31:28

²⁶ if I have beheld the sun in its radiance or the moon moving in splendor,

²⁷ so that my heart was secretly enticed and my hand threw a kiss from my mouth,

this would also be an iniquity to be judged, for I would have denied God on high.

²⁹ If I have rejoiced in my enemy’s ruin, or exulted when evil befell him—

³⁰ I have not allowed my mouth to sin by asking for his life with a curse—

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: this would also be an iniquity to be judged, for I would have denied God on high.
KJV: This also were an iniquity to be punished by the judge: for I should have denied the God that is above.
WEB: this also would be an iniquity to be punished by the judges, for I would have denied the God who is above.
ASV: This also were an iniquity to be punished by the judges; For I should have denied the God that is above.
DARBY: This also would be an iniquity for the judge, for I should have denied the God who is above.
BLB: [then] this also be judged an iniquity, for I would have lied to God above.

ÅB: Nei, også det ville være en misgjerning, hjemfalt til dom; for da hadde jeg fornektet Gud i det høye.
OTB: Det ville også vært en synd som fortjente dom,
For jeg ville ha fornektet Gud i det høye.
B1930: Nei, også det vilde være en misgjerning, hjemfalt til dom; for da hadde jeg fornektet Gud i det høie.

Deuteronomy 17:2–7
If a man or woman among you in one of the towns that the LORD your God gives you is found doing evil in the sight of the LORD your God by transgressing His covenant
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Job 31:11
For that would be a heinous crime, an iniquity to be judged.
Read in context
Psalms 50:6
And the heavens proclaim His righteousness, for God Himself is Judge. Selah
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Job 9:15
For even if I were right, I could not answer. I could only beg my Judge for mercy.
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Joshua 24:27
And Joshua said to all the people, “You see this stone. It will be a witness against us, for it has heard all the words the LORD has spoken to us, and it will be a witness against you if you ever deny your God.”
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Joshua 24:23
“Now, therefore,” he said, “get rid of the foreign gods among you and incline your hearts to the LORD, the God of Israel.”
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Genesis 18:25
Far be it from You to do such a thing—to kill the righteous with the wicked, so that the righteous and the wicked are treated alike. Far be it from You! Will not the Judge of all the earth do what is right?”
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Judges 11:27
I have not sinned against you, but you have done me wrong by waging war against me. May the LORD, the Judge, decide today between the Israelites and the Ammonites.”
Read in context