Deuteronomy 19:7

5 As when a man goeth into the wood with his neighbour to hew wood, and his hand fetcheth a stroke with the axe to cut down the tree, and the head slippeth from the helve, and lighteth upon his neighbour, that he die; he shall flee unto one of those cities, and live:

6 Lest the avenger of the blood pursue the slayer, while his heart 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.

Wherefore I command thee, saying, Thou shalt separate three cities for thee.

8 And if the LORD thy God enlarge thy coast, as he hath sworn unto thy fathers, and give thee all the land which he promised to give unto thy fathers;

9 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:

This was said to Israel at a particular time, so it is wise to read it together with the surrounding text. Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
This is why I am commanding you to set apart for yourselves three cities.
KJV
Wherefore I command thee, saying, Thou shalt separate three cities for thee.
WEB
Therefore I command you to set apart three cities for yourselves.
ASV
Wherefore I command thee, saying, Thou shalt set apart three cities for thee.
DARBY
Therefore I command thee, saying, Thou shalt separate three cities for thyself.
BLB
Upon thus I command you, in saying, three cities you shall separate for yourself.
ÅB
Derfor befaler jeg deg og sier: Du skal skille ut tre byer.
OTB
Derfor instruerer jeg deg til å etablere tre byer for deg selv.
B1930
Derfor byder jeg dig og sier: Du skal skille ut tre byer.

Study notes (Tyndale)

Original text and word study