Contradiction with Deuteronomy 18:10-12
These verses condemn practices of divination and consulting the dead, which contradicts Saul seeking the medium at Endor in proximity to the Philistine threat mentioned in 1 Samuel 28:4.
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 Leviticus 19:31
This verse instructs against turning to mediums, contradicting the implication in 1 Samuel 28:4 of consulting one as Saul later does in the narrative.
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 Isaiah 8:19
This verse discourages consulting the dead, which contrasts with Saul’s actions in 1 Samuel 28:4 context.
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?
Contradiction with 1 Chronicles 10:13
It states that Saul died for consulting a medium, contradicting the earlier acceptance of seeking others’ counsel in 1 Samuel 28:4’s timeframe.
1 Chronicles 10:13: So Saul died for his transgression which he committed against the LORD, [even] against the word of the LORD, which he kept not, and also for asking [counsel] of [one that had] a familiar spirit, to enquire [of it]; [committed: Heb. transgressed]