Whose number in the days of David, &c. That is, when David numbered the people, (2 Samuel 24.,) the descendants of Tola, Issachar's firstborn, were found to be thus many; which was a very great increase.
Related Commentaries of 1 Chronicles 7:2
1 Chronicles 7:2
2 And the sons of Tola; Uzzi, and Rephaiah, and Jeriel, and Jahmai, and Jibsam, and Shemuel, heads of their father's house, to wit, of Tola: they were valiant men of might in their generations; whose number was in the days of David two and twenty thousand and six hundred.