Deuteronomy 19:8

8 `And if Jehovah thy God doth enlarge thy border, as He hath sworn to thy fathers, and hath given to thee all the land which He hath spoken to give to thy fathers --

Deuteronomy 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 ) .

Deuteronomy 19:8 In-Context

6 lest the redeemer of blood pursue after the man-slayer when his heart is hot, and hath overtaken him (because the way is great), and hath smitten him -- the life, and he hath no sentence of death, for he is not hating him heretofore;
7 therefore I am commanding thee, saying, Three cities thou dost separate to thee.
8 `And if Jehovah thy God doth enlarge thy border, as He hath sworn to thy fathers, and hath given to thee all the land which He hath spoken to give to thy fathers --
9 when thou keepest all this command to do it, which I am commanding thee to-day, to love Jehovah thy God, and to walk in His ways all the days -- then thou hast added to thee yet three cities to these three;
10 and innocent blood is not shed in the midst of thy land which Jehovah thy God is giving to thee -- an inheritance, and there hath been upon thee blood.
Young's Literal Translation is in the public domain.