Word of God

Holy scriptures

 * You, however, continue in the things that you learned and were persuaded to believe, knowing from whom you learned them and that from infancy you have known the holy writings, which are able to make you wise for salvation through faith in Christ Jesus. All Scripture is inspired of God and beneficial for teaching, for reproving, for setting things straight,* for disciplining in righteousness, so that the man of God may be fully competent, completely equipped for every good work.
 * —2 Timothy 3:14-17
 * * Or “correcting.”

Sword of the spirit

 * Also, accept the helmet of salvation, and the sword of the spirit, that is, God’s word, while with every form of prayer and supplication you carry on prayer on every occasion in spirit. And to that end stay awake, constantly making supplication in behalf of all the holy ones.
 * —Ephesians 6:17, 18