Hesabu 35 : 16 Numbers chapter 35 verse 16

Lakini kama alimpiga kwa chombo cha chuma, akafa, ni mwuaji huyo; mwuaji hakika yake atauawa.
soma Mlango wa 35

But if he struck him with an instrument of iron, so that he died, he is a murderer: the murderer shall surely be put to death.