Atonement
In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin and for uncleanness. Zechariah 13:1
Right after the pierced One of chapter 12, a fountain is opened to wash away sin and uncleanness. That cleansing flows from the Atonement of Jesus Christ.
How we know: the chapter heading names Him
- alludes to Zechariah 12:10 — the fountain follows the looking upon the pierced One
