Bible Verses About Watchfulness: God especially requires in ministers

I have posted watchmen on your walls, Yerushalayim; they will never fall silent, neither by day nor by night. You who call on ADONAI, give yourselves no rest;

"Human being, I have appointed you to be a watchman for the house of Isra'el. When you hear a word from my mouth, you are to warn them for me.

"It's like a man who travels away from home, puts his servants in charge, each with his own task, and tells the doorkeeper to stay alert.