Contradiction with Exodus 20:5
This verse mentions God as a jealous God, visiting iniquity on generations, which seems to contradict the merciful and gracious characterization in Psalms 145:8.
Exodus 20:5: Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
Contradiction with Deuteronomy 7:10
God repays those who hate Him to their face, which contrasts with the slow to anger description in Psalms 145:8.
Deuteronomy 7:10: And repayeth them that hate him to their face, to destroy them: he will not be slack to him that hateth him, he will repay him to his face.
Contradiction with Numbers 31:17-18
God orders the Israelites to kill men, women, and non-virgin women, which contrasts with being full of compassion.
Numbers 31:17-18: Now therefore kill every male among the little ones, and kill every woman that hath known man by lying with him. [him: Heb. a male]
Contradiction with 1 Samuel 15:3
God commands the complete destruction of Amalek, contradicting the notion of mercy in Psalms 145:8.
1 Samuel 15:3: Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.
Contradiction with Nahum 1:2
The Lord is described as avenging and furious, directly opposing the slow to anger aspect.
Nahum 1:2: God [is] jealous, and the LORD revengeth; the LORD revengeth, and [is] furious; the LORD will take vengeance on his adversaries, and he reserveth [wrath] for his enemies. [God...: or, The LORD is a jealous God, and a revenger, etc] [is furious: Heb. that hath fury]
Contradiction with Jeremiah 13:14
God speaks of not sparing or having pity, which contradicts being gracious and full of compassion.
Jeremiah 13:14: And I will dash them one against another, even the fathers and the sons together, saith the LORD: I will not pity, nor spare, nor have mercy, but destroy them. [one...: Heb. a man against his brother] [but...: Heb. from destroying them]
Contradiction with Isaiah 63:3-6
God's wrath and vengeance are depicted, contrasting the merciful and slow to anger portrayal.
Isaiah 63:3-6: I have trodden the winepress alone; and of the people [there was] none with me: for I will tread them in mine anger, and trample them in my fury; and their blood shall be sprinkled upon my garments, and I will stain all my raiment.
Paradox #1
The potential contradiction or conflict might arise if people interpret the emphasis on compassion and mercy as inconsistent when compared to other parts of religious texts that depict harsher judgments or punishment. Different interpretations and selective emphasis on various verses can lead to perceived inconsistencies in teachings about mercy versus justice.