Zechariah 12 : 10-11 and Zechariah 13 : 1

I will pour out on the family of David and the inhabitants of Jerusalem a spirit of love and supplication. They will look at the One who was pierced and mourn for Him as for an only child, weeping bitterly as for a firstborn. The mourning in Jerusalem will be as great as the mourning of Haddadrimmon in the plain of Megiddo.

On that day a spring will well up for the family of David and for the inhabitants of Jerusalem to cleanse themselves of sin and defilement. YHVH, God of hosts says.