Ephesians 6:17-20 (NKJV)
17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God;
18 praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saints—
19 and for me, that utterance may be given to me, that I may open my mouth boldly to make known the mystery of the gospel,
20 for which I am an ambassador in chains; that in it I may speak boldly, as I ought to speak.