Contradiction with Proverbs 1:28
This verse suggests that when some call upon God, He will not answer them, contrary to Psalms 69:13 that expresses confidence in God's timely response to prayer.
Proverbs 1:28: Then shall they call upon me, but I will not answer; they shall seek me early, but they shall not find me:
Contradiction with Isaiah 1:15
This verse states that despite many prayers, God will not hear because sin obstructs the relationship, contrasting with the assurance of being heard in Psalms 69:13.
Isaiah 1:15: And when ye spread forth your hands, I will hide mine eyes from you: yea, when ye make many prayers, I will not hear: your hands are full of blood. [make...: Heb. multiply prayer] [blood: Heb. bloods]