Contradiction with Matthew 6:7
This verse advises against using vain repetitions in prayer, whereas Psalms 66:17 mentions praising God with vocalized words.
Matthew 6:7: But when ye pray, use not vain repetitions, as the heathen [do]: for they think that they shall be heard for their much speaking.
Contradiction with Matthew 6:6
This verse suggests praying in private rather than openly expressing one's voice as in Psalms 66:17.
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 Ecclesiastes 5:2
Warns against speaking too much before God, contrasting with the notion of vocal praise in Psalms 66:17.
Ecclesiastes 5:2: Be not rash with thy mouth, and let not thine heart be hasty to utter [any] thing before God: for God [is] in heaven, and thou upon earth: therefore let thy words be few. [thing: or, word]
Contradiction with Proverbs 10:19
Suggests that multitude of words leads to sin, potentially conflicting with audibly praising as mentioned in Psalms 66:17.
Proverbs 10:19: In the multitude of words there wanteth not sin: but he that refraineth his lips [is] wise.