Zechariah 12:10 in the King James Version
And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.
Context
9 It will happen in that day, that I will seek to destroy all the nations that come against Jerusalem.
10 I will pour on David’s house and on the inhabitants of Jerusalem the spirit of grace and of supplication. They will look to me 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 In that day there will be a great mourning in Jerusalem, like the mourning of Hadadrimmon in the valley of Megiddo.