Numbers 35:15-17

Young's Literal Translation

¹⁵ To sons of Israel, and to a sojourner, and to a settler in their midst, are these six cities for a refuge, for the fleeing thither of any one smiting a person unawares.

¹⁶ `And if with an instrument of iron he hath smitten him, and he dieth, he [is] a murderer: the murderer is certainly put to death.

¹⁷ `And if with a stone [in] the hand, wherewith he dieth, he hath smitten him, and he dieth, he [is] a murderer: the murderer is certainly put to death.