John Gill Commentary Deuteronomy 30:5

"and Jehovah thy God will bring thee into the land which thy fathers possessed, and thou shalt possess it; and he will do thee good, and multiply thee above thy fathers." — Deuteronomy 30:5 (ASV)

And the Lord your God will bring you into the land which your
fathers possessed, and you shall possess it
That the Jews upon their conversion in the latter day will return to the land of Judea again, and possess it, is the sense of many passages of Scripture; among others, see (Jeremiah 30:18) (Ezekiel 28:25Ezekiel 28:26) (Ezekiel 37:21Ezekiel 37:22Ezekiel 37:25) (Zechariah 10:10) ; the above Targum is; ``the Word of the Lord will bring you'' and he will do you good ;
both in things temporal and spiritual; see (Ezekiel 34:24–31) ;

and multiply you above your fathers ;
increase their number more than ever they were in any age; for they shall be as the sand of the sea, which cannot be numbered, (Hosea 1:10Hosea 1:11) .