Hallelujah!

(Thomas Boston, "Human Nature in its Fourfold State")

"After this I heard something like the loud voice of a vast
 multitude in heaven, shouting: Hallelujah! Salvation, glory,
 and power belong to our God, because His judgments are
 true and righteous! And again they shouted: Hallelujah!
 The smoke from her goes up for ever and ever!" Rev. 19:1-3

None were so compassionate as the saints when on earth,
during the time of God's patience. But now that time is at
an end. Their compassion for the ungodly is swallowed in
joy in the Mediator's glory, and His executing just judgment,
by which His enemies are made His footstool.

Though, when on earth, the righteous man wept in secret
places for their pride, and because they would not hear; yet
"The righteous will rejoice when he sees the retribution;
he will wash his feet in the blood of the wicked." Ps. 58:10

No pity shall then be shown them from their nearest relations.
The godly wife shall applaud the justice of the Judge, in the
condemnation of her ungodly husband! The godly husband
shall say Amen! to the condemnation of her who lay in his
bosom. The godly parents shall say Hallelujah! at the
passing of the sentence against their ungodly child. And the
godly child shall, from the bottom of his heart, approve the
condemnation of his wicked parents—the father who begat
him, and the mother who bore him.

"Then I heard what sounded like a great multitude, like the
 roar of rushing waters and like loud peals of thunder, shouting:
 Hallelujah! For our Lord God Almighty reigns!" Revelation 19:6