"Every word of God is flawless; he is a shield to those who take refuge in him." (NIV)
Every word of God is tried and purified; He is a shield to those who trust and take refuge in Him. [Ps. 18:30; 84:11; 115:9-11.] (AMP)
Every word of God is pure: he is a shield unto them that put their trust in him. (KJV)