Deuteronomy 19:9

[then] {if you diligently observe this entire commandment} that I [am] commanding you {today} by loving Yahweh your God and by going in his ways {at all times}, then you shall add three more cities for yourselves to these three.

Joshua 20:7-8

So {they set apart} Kedesh in Galilee in the hill country of Naphtali, Shechem in the hill country of Ephraim, and Kiriath Arba (that [is], Hebron) in the hill country of Judah.

Deuteronomy 11:22-25

Yes, if you diligently keep all this commandment that I [am] commanding you {to observe it}, by loving Yahweh your God {by walking in} all his ways and by holding fast to him,

Deuteronomy 12:32

All of the things that I [am] commanding you, {you must diligently observe}; you shall not add to it, and you shall not take away from it."

Treasury of Scripture Knowledge

Summary

If thou shalt keep all these commandments to do them, which I command thee this day, to love the LORD thy God, and to walk ever in his ways; then shalt thou add three cities more for thee, beside these three:

Then shalt thou

Bible References

If thou shalt

Deuteronomy 11:22
Yes, if you diligently keep all this commandment that I [am] commanding you {to observe it}, by loving Yahweh your God {by walking in} all his ways and by holding fast to him,
Deuteronomy 12:32
All of the things that I [am] commanding you, {you must diligently observe}; you shall not add to it, and you shall not take away from it."

Then shalt thou

Joshua 20:7
So {they set apart} Kedesh in Galilee in the hill country of Naphtali, Shechem in the hill country of Ephraim, and Kiriath Arba (that [is], Hebron) in the hill country of Judah.