In Psalm 109:17-19, the same imprecatory logic appears: the enemy's own love of cursing brings multiplied curses upon him.

In Psalm 81:12, God gives the stubborn over to their own ways — a judgment similar to the plea for added punishment here.

Psalm 24:5 describes the blessing received by the righteous, contrasting with the punishment sought for the wicked in Psalm 69:27.

In Exodus 9:12, God hardens Pharaoh's heart, directly fulfilling the idea of adding to sin and judgment — a divine act of judgment.

In Matthew 23:32, Jesus tells the Pharisees to 'fill up the measure of your fathers' — a direct parallel to the imprecatory 'add iniquity'.

Nehemiah 4:5 contains a similar imprecatory prayer asking God not to forgive enemies, directly paralleling the plea in Psalm 69:27.

In Leviticus 26:39, the remnant rots away due to accumulated iniquity — a picture of the added punishment the psalmist prays for.

In Romans 1:28, God gives them over to a debased mind — a judicial hardening similar to adding iniquity as judgment.