The spirit of grace and the mourning of judgment

The Spirit of grace, The two verses where the exact phrase is used.

Zechariah 12 ⁹And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem. ¹⁰And 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.¹¹In that day shall there be a great mourning in Jerusalem, as the mourning of Hadadrimmon in the valley of Megiddon.
¹²And the land shall mourn, every family apart; the family of the house of David apart, and their wives apart; the family of the house of Nathan apart, and their wives apart; ¹³The family of the house of Levi apart, and their wives apart; the family of Shimei apart, and their wives apart; ¹⁴All the families that remain, every family apart, and their wives apart.

Hebrews 10 ²⁶For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, ²⁷But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries. ²⁸He that despised Moses' law died without mercy under two or three witnesses: ²⁹Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace? ³⁰For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people. ³¹It is a fearful thing to fall into the hands of the living God. ³²But call to remembrance the former days, in which, after ye were illuminated, ye endured a great fight of afflictions;