Contradiction with Proverbs 16:5
While Psalms 149:4 speaks of the Lord taking pleasure in His people, Proverbs 16:5 states that everyone who is proud in heart is an abomination to the Lord, suggesting that there are people whom the Lord does not take pleasure in.
Proverbs 16:5: Every one [that is] proud in heart [is] an abomination to the LORD: [though] hand [join] in hand, he shall not be unpunished. [unpunished: Heb. held innocent]
Contradiction with Isaiah 66:3
This verse implies that the same actions of worship and sacrifice can be abominable to God, contradicting the affirmation of God's pleasure in His people.
Isaiah 66:3: He that killeth an ox [is as if] he slew a man; he that sacrificeth a lamb, [as if] he cut off a dog's neck; he that offereth an oblation, [as if he offered] swine's blood; he that burneth incense, [as if] he blessed an idol. Yea, they have chosen their own ways, and their soul delighteth in their abominations. [lamb: or, kid] [burneth: Heb. maketh a memorial of]
Contradiction with Jeremiah 6:20
The verse shows that God does not find offerings and sacrifices pleasing, contradicting Psalms 149:4 where the Lord is said to delight in His people.
Jeremiah 6:20: To what purpose cometh there to me incense from Sheba, and the sweet cane from a far country? your burnt offerings [are] not acceptable, nor your sacrifices sweet unto me.