Ephesians 6:11

Ephesians 6:11; Ephesians 6:13. That ye may be able to stand against the wiles of the devil. For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. Wherefore take unto you the whole armor of God, that ye may be able to withstand in the evil day, and having done all, to stand.

To keep your ground, not to give way in any respect, and blessed is that man whose name is Stand-fast, and whose practice is to hold fast -"having done all to stand."