The sword of the Spirit.

“The sword of the Spirit which is the Word (rhema) of God”. (Ephesians 6:17).

“The significance of the Greek word rhema (as distinct from logos) is exemplified in the injunction to take “the sword of the Spirit, which is the Word of God”; here the reference is not to the whole Bible as such, but to the scripture which the Spirit brings to our remembrance for use in time of need, a prerequisite being the regular storing of mind with Scripture”.

(Vine’s Expository Dictionary of Biblical Words p.683).

The Lord Jesus Christ is our role model for He counteracted Satan with the Scriptures during His temptations. (Matthew 4:1-11; Luke 4:1-13).