Numbers 35:21

19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.

20 But if he thrust him of hatred, or hurl at him by laying of wait, that he die;

Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him.

22 But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait,

23 Or with any stone, wherewith a man may die, seeing him not, and cast it upon him, that he die, and was not his enemy, neither sought his harm:

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
or if in hostility he strikes him with his hand and he dies, the one who struck him must surely be put to death; he is a murderer. When the avenger of blood finds the murderer, he is to kill him.
KJV
Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him.
WEB
or in hostility struck him with his hand, so that he died, he who struck him shall surely be put to death. He is a murderer. The avenger of blood shall put the murderer to death when he meets him.
ASV
or in enmity smote him with his hand, so that he died; he that smote him shall surely be put to death; he is a murderer: the avenger of blood shall put the murderer to death, when he meeteth him.
DARBY
or from enmity smite him with his hand, so that he die, he that smote him shall certainly be put to death; he is a murderer: the avenger of blood shall put the murderer to death, when he meeteth him.
BLB
or in enmity he strikes him with his hand and he dies, the one who struck [him] must surely be put to death; he [is] a murderer. The avenger of blood shall put to death the murderer when he meets him.
ÅB
eller av fiendskap slår ham med sin hånd så han dør, da skal den som slo, late livet; han er en manndraper, og blodhevneren kan drepe manndraperen når han treffer på ham.
OTB
eller hvis noen slår en annen med fiendtlighet og forårsaker død, er gjerningsmannen en morder og må dø. Blodhevneren skal henrette morderen når de møtes.
B1930
eller av fiendskap slår ham med sin hånd så han dør, da skal den som slo, late livet; han er en manndraper, og blodhevneren kan drepe manndraperen når han treffer på ham.

Study notes (Tyndale)

Original text and word study