Luke 19:37-38: "37 As he was drawing near - already on the way down the Mount of Olives - the whole multitude of his disciples began to rejoice and praise God with a loud voice for all the mighty works that they had seen, 38 saying, 'Blessed is the King who comes in the name of the Lord! Peace in heaven and glory in the highest!'"
Philippians 2:9-11: "9 Therefore God has highly exalted him and bestowed on him the name that is above every name, 10 so that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, 11 and every tongue confess that Jesus Christ is Lord, to the glory of God the Father."
John 1:1-4: "1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through him, and without him was not any thing made that was made. 4 In him was life, and the life was the light of men."
John 1:14: "14 And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth."
Revelation 6:11-14: "11 Then they were each given a white robe and told to rest a little longer, until the number of their fellow servants and their brothers should be complete, who were to be killed as they themselves had been.
"12 When he opened the sixth seal, I looked, and behold, there was a great earthquake, and the sun became black as sackcloth, the full moon became like blood, 13 and the stars of the sky fell to the earth as the fig tree sheds its winter fruit when shaken by a gale. 14 The sky vanished like a scroll that is being rolled up, and every mountain and island was removed from its place."
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The text is public domain:
1 When morning gilds the skies,My heart, awaking, cries,"May Jesus Christ be praised!"When evening shadows fall,This rings my curfew call:"May Jesus Christ be praised!"2 When mirth for music longs,This is my song of songs:"May Jesus Christ be praised!"God's holy house of prayerHath none that can compareWith "Jesus Christ be praised!"3 No lovelier antiphonIn all high heav'n is knownThan "Jesus Christ be praised!"There to the eternal WordThe eternal psalm is heard:"May Jesus Christ be praised!"4 Ye nations of mankind,In this your concord find:"May Jesus Christ be praised!"Let all the earth aroundRing joyous with the sound:"May Jesus Christ be praised!"5 Sing, suns and stars of space,Sing, ye that see His face,Sing, "Jesus Christ be praised!"God's whole creation o'er,Both now and evermoreShall Jesus Christ be praised!
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These citations seem to be only tenuously connected to the hymn text. Luke 19:37-38 and Philippians 2:9-11 refer to praising God, so they could be cited for the repeated "Jesus Christ be praised!" throughout the hymn. The two passages from John 1 are the source for the title "the eternal Word" in the third verse. The only similarity between the passage from Revelation 6 and the hymn text seems to be the mention of the sun and stars (in the hymn's fifth verse), but those lines bear a much stronger resemblance to Psalm 148:3: "Praise him, sun and moon, praise him, all you shining stars!"
The first verse seems to be drawn from Psalm 113:3: "From the rising of the sun to its setting, the name of the LORD is to be praised!" Both texts involve praising God and are framed by a temporal merism.
