Devarim 19:8

8 And if Hashem Eloheicha enlarge thy territory, as He hath sworn unto Avoteicha, and give thee kol ha’aretz which He promised to give unto Avoteicha;

Devarim 19:8 Meaning and Commentary

Deuteronomy 19:8

And if the Lord thy God enlarge thy coast
Extend it further than it was upon their first settlement, even carry it as far as the river Euphrates, as in the times of Solomon, ( 1 Kings 4:21 1 Kings 4:24 ) . Jarchi interprets it of such an enlargement as to give them the land of the Kenites, the Kenizzites and Kadmonites:

(as he hath sworn unto thy fathers), and give thee all the land which
he promised to give unto thy, fathers:
Abraham, Isaac, and Jacob; see ( Genesis 15:19 ) ( Genesis 26:3 Genesis 26:4 ) ( Genesis 28:13 Genesis 28:14 ) .

Devarim 19:8 In-Context

6 Lest the Go’el HaDahm pursue the slayer, while his lev is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past.

7 Therefore I command thee, saying, Thou shalt separate shalosh arim for thee.

8 And if Hashem Eloheicha enlarge thy territory, as He hath sworn unto Avoteicha, and give thee kol ha’aretz which He promised to give unto Avoteicha;

9 If thou shalt be shomer over all these mitzvot to do them, which I command thee today, to love Hashem Eloheicha, and to walk ever in His ways; then shalt thou add three towns more for thee, beside these three;

10 That dahm naki (innocent blood) be not shed in thy land, which Hashem Eloheicha giveth thee for a nachalah, and so dahmim be upon thee.