I…heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand.@Revelation 5:11
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Thomas Kelly (1769-1855)

Thomas Kelly, Hymns on Various Passages of Scripture, second edition, 1806. The original first line was Hark, ten thousand voices cry. The current version appeared in the Irish Church Hymnal in 1873.

St. Oswald John B. Dykes, 1857 (🔊 pdf nwc).

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John B. Dykes (1823-1876)

Hark! ten thousand voices sounding,
Far and wide throughout the sky;
’Tis the voice of joy abounding,
Jesus lives no more to die.

Jesus lives, His conflict over,
Lives to claim His great reward;
Angels round the Victor hover,
Crowding to behold their Lord.

Yonder throne for Him erected
Now becomes the Victor’s seat;
Lo, the Man on earth rejected,
Angels worship at His feet!

All the powers of Heav’n adore Him,
All obey His sovereign Word;
Day and night they cry before Him,
Holy, Holy, Holy Lord!