Zechariah 12
10 Ref I will pour on the house of David, and on the inhabitants of Jerusalem, the spirit of grace and of supplication; and they will look to me{After "me," the Hebrew has the two letters "Aleph Tav" (the first and last letters of the Hebrew alphabet), not as a word, but as a grammatical marker.} whom they have pierced; and they shall mourn for him, as one mourns for his only son, and will grieve bitterly for him, as one grieves for his firstborn.
11 Ref In that day there will be a great mourning in Jerusalem, like the mourning of Hadadrimmon in the valley of Megiddon.