'Alert' in the Bible

Blessed are those slaves whom their master finds alert when he returns! I tell you the truth, he will dress himself to serve, have them take their place at the table, and will come and wait on them!

Even if he comes in the second or third watch of the night and finds them alert, blessed are those slaves!

But stay alert at all times, praying that you may have strength to escape all these things that must happen, and to stand before the Son of Man."