John Gill's Exposition of the Whole Bible
Proverbs 21:27
The sacrifice of the wicked [is] abomination,.... That is, to the Lord, as in Proverbs 15:8; and as it is here added in the Septuagint and Arabic versions;
how much more, [when] he bringeth it with a wicked mind? the Arabic version is, "with a mind alien from the law"; or when it is not brought according to law; when it is a corrupt thing, that which is torn, lame, or sick, or robbery for burnt sacrifice; when it is done with an evil intention, to cover sin, to atone for without repenting of it or forsaking it; that they may go on in sin with impunity, and be allowed to commit it; for which cause Balak and Balsam offered sacrifices, which is the instance Jarchi produces; and indeed every religious action not done in faith, and love, and sincerity, and with a view to the glory of God, but in hypocrisy and with selfish views, in order to procure acceptance with God and justification in his sight; setting aside the righteousness, sacrifice, and satisfaction of the son of God, is done with a wicked mind, and is an abomination to the Lord. Some render it, "even though he brings it diligently", or "with great art and skill" i; is constant at his devotion, and carries it so artfully, and with such a show of religion, as to deceive men, yet he cannot deceive the Lord.
i בזמה "solerter", De Dieu.