Hebrews 13:12

12 And so Jesus also suffered outside the city gate to make the people holy through his own blood.

Read Hebrews 13:12 Using Other Translations

Wherefore Jesus also, that he might sanctify the people with his own blood, suffered without the gate.
So Jesus also suffered outside the gate in order to sanctify the people through his own blood.
So also Jesus suffered and died outside the city gates to make his people holy by means of his own blood.