Deuteronomy 25:18
How he met thee by the way, and smote the hindmost of thee, even all that were feeble behind thee, when thou wast faint and weary; and he feared not God.
Cross-reference
Psalm 36:1
Allusion
In Psalm 36:1, 'no fear of God before his eyes' directly mirrors the description of Amalek's lack of fear.
Romans 3:18
Allusion
In Romans 3:18, Paul quotes Psalm 36:1, which itself echoes the description of Amalek's godlessness.
2 Samuel 17:2
Parallel
2 Samuel 17:2 describes Ahithophel's plan to attack David when weary and weak — mirroring Amalek's strategy.
Numbers 10:25
Historical context
Numbers 10:25 describes the rear guard of the camp — the same vulnerable position Amalek attacked.