Deuteronomy 2:30 shows God hardening Sihon's heart to deliver him — the same divine judicial hardening as the dullness of heart here.

Isaiah 6:10 uses the same 'dullness of heart' for judgment — God prevents repentance, matching the curse here.

Deuteronomy 27:15-26 lists covenant curses for disobedience — the 'curse' here is that same divine penalty.

Psalm 109:17 describes a love for cursing bringing reciprocal curse — similar theme of divine retribution through curses.

1 Corinthians 16:22 pronounces an anathema on those not loving the Lord — a curse like the one here, in NT context.

Psalm 109:18 pictures cursing as internalized like water and oil — the curse becomes part of the person, like here.