 As the numeric value (gematria) of the word "power" (, "koach") in is 28, Jacob ben Asher (the Baal Ha-Turim) saw an allusion to Joshua, who lead the Israelites for 28 years.And the Baal Ha-Turim saw a connection with the reference to Joshua in "‘Let the Lord, the God of the spirits of all flesh, set a man over the congregation, who may go out before them, and who may come in before them, and who may lead them out, and who may bring them in; that the congregation of the Lord be not as sheep which have no shepherd,'" as those two verses contain 28 words in Hebrew.Maimonides and the siddur report that the Levites would recite the Psalm for the Day in the Temple.