Contradiction with Matthew 6:6
Contradicts by emphasizing private worship, whereas Psalms 66:13 implies public worship.
Matthew 6:6: But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.
Contradiction with Matthew 5:23-24
Contradicts by demanding reconciliation before offering gifts, whereas Psalms 66:13 focuses on offering burnt sacrifices.
Matthew 5:23-24: Therefore if thou bring thy gift to the altar, and there rememberest that thy brother hath ought against thee;