Contradiction with Ecclesiastes 12:12
This verse warns against the endless study and weariness of much study, whereas Psalms 1:2 encourages meditating on the law day and night.
Ecclesiastes 12:12: And further, by these, my son, be admonished: of making many books [there is] no end; and much study [is] a weariness of the flesh. [study: or, reading]
Contradiction with Isaiah 29:13
This verse highlights people drawing near to God with their mouths, while their hearts are far from Him, contradicting the genuine delight in God's law in Psalms 1:2.
Isaiah 29:13: Wherefore the Lord said, Forasmuch as this people draw near [me] with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men:
Contradiction with Hebrews 8:10
This verse describes God's laws being put into one's mind and written in their hearts, somewhat passively, rather than the active meditation described in Psalms 1:2.
Hebrews 8:10: For this [is] the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people: [put: Gr. give] [in: or, upon]
Contradiction with Amos 5:21-23
God expresses disdain for outward religious rituals without heartfelt devotion; if meditation becomes ritualistic, it contradicts the genuine delight described in Psalms 1:2.
Amos 5:21-23: I hate, I despise your feast days, and I will not smell in your solemn assemblies. [in...: or, your holy days]