Soldiers generally acted as
  Matthew 27:65,66  
 Citizens sometimes acted as
  Nehemiah 7:3  
 WERE STATIONED   On watch towers
  2 Kings 9:17; Isaiah 21:5   
 On the walls of cities
  Isaiah 62:6   
 In the streets of cities
  Psalm 127:1   
 Around the temple in Jerusalem on special occasions
  2 Kings 11:6   
 Paraded the streets at night to preserve order
  Song of Solomon 3:3; 5:7  
 IN TIME OF DANGER   Increase in number
  Jeremiah 51:12   
 Vigilant night and day
  Nehemiah 4:9; Isaiah 21:8   
 Reported the approach of all strangers
  2 Samuel 18:24-27; 2 Kings 9:18-20; Isaiah 21:6,7,9   
 Sounded an alarm at the approach of enemies
  Ezekiel 33:2,3   
 Vigilance of, vain without God's protection
  Psalm 127:1  
 Were relieved by turns
  Nehemiah 7:3  
 Danger of sleeping on their posts, referred to
  Matthew 28:13,14  
 Neglecting to give warning punished with death
  Ezekiel 33:6  
 Often interrogated by passengers
  Isaiah 21:11  
 ILLUSTRATIVE   Of ministers
  Isaiah 5:28; 62:6; Ezekiel 3:17; Hebrews 13:17   
 (Blind,) of careless ministers
  Isaiah 56:10   
 (Looking for the morning,) of anxious waiting for God
  Psalm 130:5,6