Zechariah 12:10 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. (World English Bible)