Cross reference
Genesis 35:21
21 And Israel journeyed, and spread his tent beyond the tower of Edar.
Micah 4:8
8 And thou, O tower of the flock, the strong hold of the daughter of Zion, unto thee shall it come, even the first dominion; the kingdom shall come to the daughter of Jerusalem.
Luke 2:8
8 And there were in the same country shepherds abiding in the field, keeping watch over their flock by night.