Numbers 35:30-33 Whoever kills 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.

CKJV_Strongs⁽ⁱ⁾

30 H5221 Whoever kills H5315 any person, H7523 the murderer H7523 shall be put to death H6310 by the mouth H5707 of witnesses: H259 but one H5707 witness H6030 shall not testify H5315 against any person H4191 to cause him to die.

31 H3947 Moreover you shall take H3724 no satisfaction H5315 for the life H7523 of a murderer, H7563 which is guilty H4191 of death: H4191 but he shall be surely H4191 put to death.

32 H3947 And you shall take H3724 no satisfaction H5127 for him that is fled H5892 to the city H4733 of his refuge, H7725 that he should come again H3427 to live H776 in the land, H4194 until the death H3548 of the priest.

33 H2610 So you shall not pollute H776 the land H1818 where you are: for blood H2610 it defiles H776 the land: H776 and the land H3722 cannot be cleansed H1818 of the blood H8210 that is shed H1818 in it, but by the blood H8210 of him that shed it.