Isaiah 66: Father of boundless grace

Father of boundless grace,
Thou hast in part fulfill'd
Thy promise made to Adam's race.
In God incarnate seal'd:
A few from every land
At first to Salem came,
And saw the wonders of Thy hand,
And saw the tongues of flame!

From thence Thy heralds run
To earth's remotest bound.
And made Thy glorious mercy known.
And spread the joyful sound:
They call'd the listening throng
To know their sins forgiven,
And brought them in, from every tongue
And nation under heaven.

Yet still we wait the end,
The coming of our Lord,
The full accomplishment attend
Of Thy prophetic word:
Thy promise deeper lies
In unexhausted grace.
And new-discover'd worlds arise
To sing their Saviour's praise.

Beloved for Jesu's sake,
By Him redeem'd of old,
All nations must come in, and make
One undivided fold;
While gather'd in by Thee,
And perfected in one,
They all at once Thy glory see
In Thine eternal Son.