Malachi 2:10 gives the reason for the curse: faithlessness and profaning the covenant. Verse 12 is the consequence.

In 1 Samuel 15:22, Samuel says obedience is better than sacrifice — directly supporting why God rejects offerings from the disobedient.

In Amos 5:22, God explicitly refuses to accept offerings from the unjust — a direct parallel to the futility of offerings in Malachi.

In Isaiah 66:3, God compares wicked sacrifices to abominations — strongly reinforcing that offerings from the sinful are unacceptable.

Isaiah 9:14-16 describes God cutting off deceptive leaders from Israel — the same 'cut off' judgment for those who mislead, like the false priests in Malachi.

Nehemiah 13:29 prays about priests who 'desecrated the priesthood' — echoing Malachi's accusation that unfaithful priests profane the covenant.

Nehemiah 13:28 describes a priest being expelled for marrying a foreigner — a direct fulfillment of the 'cut off' curse Malachi pronounces.

Ezra 10:19 records those same priests repenting and putting away their foreign wives — a contrast to Malachi's curse, showing a repentant alternative.

Ezra 10:18 lists priests who married foreign women — the very offense Malachi curses. This shows the historical reality of the sin Malachi condemns.

Genesis 4:3-5 shows God rejecting Cain's offering due to his heart—parallel to Malachi's curse on offerings from the unfaithful.

In 1 Samuel 2:31-34, God cuts off Eli's priestly house for irreverence — a specific historical example of the 'cut off' judgment Malachi invokes against unfaithful priests.

Joshua 23:13 warns that intermarriage will make foreign nations a snare until Israel perishes from the land — the same consequence of being 'cut off' that Malachi pronounces.

Numbers 15:31 cuts off those who despise the Lord's word — the same rationale for removing the perpetrator from the community.

Numbers 15:30 prescribes cutting off for presumptuous sin — aligning with the deliberate covenant violation Malachi judges.

Leviticus 20:3 cuts off those who defile the sanctuary by offering children to Molech — a specific parallel to profaning the sanctuary through foreign worship.

Leviticus 18:29 establishes the 'cut off' penalty for abominations — the same judgment formula applied here to intermarriage.

Joshua 23:13 warns that foreign nations become snares — the very danger of intermarriage that leads to being cut off.

In 1 Samuel 3:14, God declares no offering can atone for Eli's house — paralleling the futility of offerings when God cuts off the offerer.

In 1 Samuel 15:23, rebellion leads to rejection — echoing the principle that sin nullifies one's standing, as in the cutting off.