“is an abomination.” Sacrifices and offerings made to God by wicked people are an abomination to God; He has no respect for them and will not accept them. Sacrifices and offerings were never designed to make a person with an evil heart acceptable in the sight of God. This verse has similarities with Proverbs 15:8.
[For more information about the sacrifices of wicked people being of no value, see commentary on Amos 5:22.]