In the New Testament, which letter describes the “armor of God”?

In the New Testament, the Letter to the Ephesians describes the “armor of God.”

Ephesians 6 uses a Roman soldier’s equipment as a metaphor for spiritual readiness. The passage names the belt of truth, the breastplate of righteousness, footwear connected with peace, the shield of faith, the helmet of salvation, and the sword of the Spirit.

The imagery appears near the end of the letter, after sections about Christian belief, community life, family relationships, and spiritual opposition. Its military language is symbolic: the passage presents steadfastness, faith, righteousness, and proclamation as forms of protection and resistance.

The letter has traditionally been attributed to Paul and is addressed to believers in Ephesus. Many modern scholars debate whether Paul personally wrote it, but the association with Paul is part of the letter’s traditional identity.