'Vigilant' in the Bible

Be vigilant; stand fast in the faith; quit yourselves like men; be strong.

A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach;

Women -- in like manner grave, not false accusers, vigilant, faithful in all things.

Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour: