ISB ~ John 19 v37

They shall look:A reference to Zech 12:10.

• Zechariah describes a day of mourning for Jerusalem, which will weep with remorse that its sins have pierced the Messiah. It is also a day of compassion, when Yahweh opens a fountain to cleanse the city of its iniquities (Zech 13:1). John may be suggesting, in light of the full context of this prophecy, that there is a close connection between the piercing of the Messiah and the opening of the fountain of divine mercy.