Luke 23:12
And the same day Pilate and Herod were made friends together: for before they were at enmity between themselves.
Cross-references
Acts 4:27
Historical context
Acts 4:27 directly names Herod and Pilate as gathering together against Jesus, confirming this historical unity.
Psalm 2:2
Prophetic fulfillment
Psalm 2:2 prophesied rulers conspiring against the LORD's Anointed — here Herod and Pilate fulfill that as they unite against Jesus.