Leviticus 16:27 commands that the remains of the bull and goat whose blood had been brought into the sanctuary on the Day of Atonement were to be carried outside the camp and burned. In its original setting this was part of the prescribed disposal of the sin offerings and emphasized the removal of what was associated with the people's sin from the holy community.
Hebrews 13:11-12 explicitly draws a comparison between this practice and the death of Jesus. Just as the bodies of those sacrificial animals were burned outside the camp, Jesus suffered outside the city gate in order to sanctify the people through His own blood. Matthew 27:33 records His crucifixion at Golgotha, outside Jerusalem. This is therefore more than a resemblance invented by later interpreters; Hebrews itself makes the typological connection. The location of Christ's suffering becomes another way in which the New Testament presents His sacrifice as the reality toward which the Levitical sin offerings pointed.