Latin Verse (as sung)
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Laudate nomen Domini, vos servi Domini,
ab ortu solis usque ad occasum ejus.

Decreta Dei justa sunt, et cor exhilarant,
Laudate Deum, principes, laudate principes et omnes populi.

English Translation
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Praise his name, you servants of the Lord,
from the rising of the sun and to its setting.

The decrees of God are just, and make glad the heart,
Praise God, ye rulers, praise (Him), ye rulers, and all people (too).

English Verse (as sung)
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O come, ye servants of the Lord, and praise his Holy name;
From early morn to setting sun, his might on earth proclaim.

His laws are just, and glad the heart;
He makes his mercies known: 
Ye princes come, ye people too,
and bow before his throne.

Words: Psalm 112, v1&3
Music: Dr Christopher Tye, 1553

This music actually has quite an interesting history, see this web page:
http://www.arach.net.au/~algernon/laudate/history.html