1 Samuel 3:14

And therefore I have sworn unto the house of Eli, that the iniquity of Eli’s house shall not be purged with sacrifice nor offering for ever.

Cross-reference

1 Samuel 2:25 Historical context

1 Samuel 2:25 explains that Eli's sons did not listen because God intended to slay them — the basis for the irreversible judgment in 3:14.

Isaiah 22:14 declares that iniquity will not be atoned for until death — directly parallel to the irreversible judgment on Eli's house.

Ezekiel 24:13 says uncleanness will not be cleansed until God's fury is satisfied — parallel to no atonement for Eli's house.

Hebrews 10:26 warns that deliberate sin leaves no sacrifice — directly parallels the irreversible loss of atonement for Eli's house.

Leviticus 9:7 shows the normal sacrificial atonement — contrasts with the exceptional decree that no sacrifice can atone for Eli's house.

Numbers 15:30 describes the 'high hand' sinner cut off without atonement — parallel to Eli's house whose sin cannot be atoned by sacrifice.

Numbers 15:31 continues: the defiant sinner's iniquity remains upon him — same principle of unforgivable sin without sacrifice.