Commentaries:
Barnes' Notes
See the marginal references. If the number of warders was, as stated in Nehemiah (Nehemiah 11:19) 172 (i. e. 168 besides the four chief warders), and the number employed at any one time was, as under David I Chronicles 26:17-18, twenty-four, then the turn of the courses to keep ward came every seven weeks.
Other Barnes' Notes entries containing 1 Chronicles 9:25:
1 Chronicles 26:1
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