Read this passage and open each verse for the full verse feed and commentary tools.
10I will pour on the house of David, and on the inhabitants of Jerusalem, the spirit of grace and of supplication; and they shall look to me whom they have pierced; and they shall mourn for him, as one mourns for his only son, and shall be in bitterness for him, as one who is in bitterness for his firstborn. 11In that day shall there be a great mourning in Jerusalem, as the mourning of Hadadrimmon in the valley of Megiddon.
Zechariah 12:10-11 (WEB)