Contradiction with 1 John 3:20
Contradicts by stating God knows everything already, whereas Psalms 38:9 speaks of making desires known to God.
1 John 3:20: For if our heart condemn us, God is greater than our heart, and knoweth all things.
Contradiction with Matthew 6:8
Contradicts by saying your Father knows your needs before you ask, whereas Psalms 38:9 indicates a need to make desires known.
Matthew 6:8: Be not ye therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.
Contradiction with Isaiah 65:24
Suggests God answers before they call, contrasting with Psalms 38:9, where desires are expressed.
Isaiah 65:24: And it shall come to pass, that before they call, I will answer; and while they are yet speaking, I will hear.