Targum do Wyjścia 17:9

And Mosheh said to Jehoshua, Choose such men as are strong in the precepts, and victorious in fight; and go, under the Cloud of glory, and set battle in array against the hosts of Amalek. Tomorrow I will stand, prepared with fasting, with the righteous fathers of the chiefs of the people, and the righteous mothers who are like the hills, with the rod with which the miracles have been wrought from before the Lord, in my hand.