1 Chronicles 12:32

And of the children of Issachar, which were men that had understanding of the times, to know what Israel ought to do; the heads of them were two hundred; and all their brethren were at their commandment.

Children of Issachar ... that had understanding of the times ... Jewish writers say that the people of this tribe were eminent for their acquirements in astronomical and physical science; and the object of the remark was probably to show that the intelligent and learned classes were united with the military, and had declared for David;