Contradiction with Jeremiah 10:2
Isaiah 19:3 describes the Egyptians seeking idols and familiar spirits, while Jeremiah 10:2 advises against the ways of heathen and being dismayed by astrological signs.
Jeremiah 10:2: Thus saith the LORD, Learn not the way of the heathen, and be not dismayed at the signs of heaven; for the heathen are dismayed at them.
Contradiction with Leviticus 19:31
Isaiah 19:3 speaks of consulting familiar spirits, whereas Leviticus 19:31 warns against turning to or seeking them, calling it defilement.
Leviticus 19:31: Regard not them that have familiar spirits, neither seek after wizards, to be defiled by them: I [am] the LORD your God.
Contradiction with Deuteronomy 18:10-12
Isaiah 19:3 mentions seeking wizards, but Deuteronomy 18:10-12 calls practices like seeking wizards an abomination.
Deuteronomy 18:10-12: There shall not be found among you [any one] that maketh his son or his daughter to pass through the fire, [or] that useth divination, [or] an observer of times, or an enchanter, or a witch,
Contradiction with 2 Kings 21:6
Isaiah 19:3 details consulting familiar spirits, while 2 Kings 21:6 describes such actions as evil in the sight of the Lord.
2 Kings 21:6: And he made his son pass through the fire, and observed times, and used enchantments, and dealt with familiar spirits and wizards: he wrought much wickedness in the sight of the LORD, to provoke [him] to anger.
Contradiction with 1 Samuel 28:7
Isaiah 19:3 mentions seeking familiar spirits, whereas 1 Samuel 28:7 presents Saul seeking a medium as a problematic act.
1 Samuel 28:7: Then said Saul unto his servants, Seek me a woman that hath a familiar spirit, that I may go to her, and enquire of her. And his servants said to him, Behold, [there is] a woman that hath a familiar spirit at Endor.
Contradiction with Galatians 5:19-21
Isaiah 19:3 talks about seeking wizards, but Galatians 5:19-21 lists practices such as witchcraft as works of the flesh that prevent inheritance of God's kingdom.
Galatians 5:19-21: Now the works of the flesh are manifest, which are [these]; Adultery, fornication, uncleanness, lasciviousness,
Contradiction with Isaiah 8:19
Isaiah 19:3 describes seeking wizards, contrary to Isaiah 8:19, which questions why the people should consult mediums when they should consult their God.
Isaiah 8:19: And when they shall say unto you, Seek unto them that have familiar spirits, and unto wizards that peep, and that mutter: should not a people seek unto their God? for the living to the dead?
Paradox #1
Isaiah 19:3 talks about the spirit of the Egyptians failing and them turning to idols and spirits for help. The contradiction or inconsistency could be that during certain periods, particularly the New Kingdom era, Egyptians had a strong belief in their own gods and a well-established religious system. This verse contradicts the idea that their faith would completely fail or rely on idols alone, as they also had complex rituals, priesthoods, and an extensive mythology.