'Alert' in the Bible

Blessed (happy, prosperous, to be admired) are those servants whom the master finds awake and watching when he arrives. I assure you and most solemnly say to you, he will prepare himself to serve, and will have them recline at the table, and will come and wait on them.

“But be sure of this, that if the head of the house had known at what time the thief was coming, he [would have been awake and alert, and] would not have allowed his house to be broken into.