'Watch' in the Bible

and command the people, saying, “You are passing through the territory of your brothers the sons of Esau (the Edomites), who live in Seir; and they will be afraid of you. So be very careful;

“Be careful during an outbreak of leprosy, that you diligently observe and do according to all that the Levitical priests teach you; just as I have commanded them, so you shall be careful to do.