Contradiction with Job 3:1
Job curses the day of his birth, which contrasts with the continuous blessing praised in Psalms 34:1.
Job 3:1: After this opened Job his mouth, and cursed his day.
Contradiction with Ecclesiastes 3:1-8
This passage describes a time for everything under the sun, including a time to refrain from praise, which contrasts with the unceasing praise in Psalms 34:1.
Ecclesiastes 3:1-8: To every [thing there is] a season, and a time to every purpose under the heaven:
Contradiction with Lamentations 3:17-18
Here, the speaker expresses loss of peace and hope, in contrast to the commitment to bless the Lord at all times as stated in Psalms 34:1.
Lamentations 3:17-18: And thou hast removed my soul far off from peace: I forgat prosperity. [prosperity: Heb. good]
Contradiction with Amos 5:18-20
The day of the Lord is portrayed as darkness, contradicting the perpetual praise found in Psalms 34:1.
Amos 5:18-20: Woe unto you that desire the day of the LORD! to what end [is] it for you? the day of the LORD [is] darkness, and not light.