Contradiction with Psalms 13:1
Psalms 13:1 expresses a feeling of being forgotten by God, which contradicts the trust and knowledge of God's name expressed in Psalms 9:10.
Psalms 13:1: [To the chief Musician, A Psalm of David.] How long wilt thou forget me, O LORD? for ever? how long wilt thou hide thy face from me? [chief...: or, overseer]
Contradiction with Psalms 22:1
This verse, where David cries out asking why God has forsaken him, contradicts the trust and reliance on God mentioned in Psalms 9:10.
Psalms 22:1: [To the chief Musician upon Aijeleth Shahar, A Psalm of David.] My God, my God, why hast thou forsaken me? [why art thou so] far from helping me, [and from] the words of my roaring? [Aijeleth...: or, the hind of the morning] [helping...: Heb. my salvation]
Contradiction with Job 23:8-9
These verses describe a feeling of not being able to perceive God, contradicting the assurance of God's presence and trustworthiness in Psalms 9:10.
Job 23:8-9: Behold, I go forward, but he [is] not [there]; and backward, but I cannot perceive him:
Contradiction with Isaiah 45:15
This verse speaks of God as one who hides Himself, which contradicts the idea of knowing and trusting God as stated in Psalms 9:10.
Isaiah 45:15: Verily thou [art] a God that hidest thyself, O God of Israel, the Saviour.
Contradiction with Lamentations 3:8
Describes a situation where God does not seem to hear prayers, contradicting the trust in God to never forsake those who seek Him as in Psalms 9:10.
Lamentations 3:8: Also when I cry and shout, he shutteth out my prayer.