“You are not causing to increase to bring in an offering! Empty incense of abomination she is to me! New moon and sabbath, to call convocations– I am not enduring sorrow and the solemn assembly.”
Isaiah 1:13 literal
The Hebrew אָוֶן, aven #205, should be translated sorrow rather than “iniquity”. Not all sorrow is good sorrow. There are two sorrows.
For sorrow according to God works reformation unto salvation without regret: but the worldly sorrow works death.
2 Corinthians 7:10 literal
One sorrow has works of death, the other sorrow has works of reformation.