Put on the full armor of God, so that you can take your stand against the devil's schemes. (NIV)
Put on God's whole armor [the armor of a heavy-armed soldier which God supplies], that you may be able successfully to stand up against [all] the strategies and the deceits of the devil. (AMP)
Put on the whole armour of God, that ye may be able to stand against the wiles of the devil. (KJV)