Their kinsmen belonging to all the clans of Issachar were in all 87,000 mighty warriors, enrolled by genealogy.
We have here a short view given us, I. Of the tribe of Issachar, whom Jacob had compared to a strong ass, couching between two burdens (Gen 49:14), an industrious tribe, that minded their country business very closely and rejoiced in their tents, Deu 33:18. And here it appears, 1. That they were a numerous tribe; for they had many wives.
Commenting on 1 Chronicles 7:1-19
The sons of Benjamin; Bela, and Becher, and Jediael, three. Benjamin had ten sons, but three only are mentioned first; the latter of these seems to be the same with Ashbel, Gen 46:21. . 1 Chronicles 7:7 ch1 7:7 ch1 7:7 ch1 7:7And the sons of Bela; Ezbon, and Uzzi, and Uzziel, and Jerimoth, and Iri, five,....
fourscore and seven thousand--exclusive of the 58,600 men which the Tola branch had produced (Ch1 7:24), so that in the days of David the tribe would have contained a population of 45,600. This large increase was owing to the practice of polygamy, as well as the fruitfulness of the women.