And I will multiply men upon you,.... Who should inhabit the cities on the mountains, and increase very much:all the house of Israel, even all of it: not the Heathens should be multiplied on them, but the Israelites, all of them, and them only; all the tribes of Israel, the ten tribes as well as the other; and which is repeated for the confirmation of it: by this it appears that the prophecy has a further view than to the return of the Jews from the Babylonish captivity; for all did not return, many remained in the provinces of Babylon; and those that returned were chiefly of the tribes of Judah and Benjamin; but few of the rest came with them.
Kimchi thinks the words have respect to the ten tribes, which he says are hid to this day; so Ben Melech.