Parallel
Numbers 35:30
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die.
If anyone kills a person, the murderer is to be put to death on the testimony of the witnesses. But no one is to be put to death based on the testimony of a lone witness.