Exodus 12:22: "'Take a bunch of hyssop and dip it in the blood that is in the basin, and touch the lintel and the two doorposts with the blood that is in the basin. None of you shall go out of the door of his house until the morning.'"
Exodus 12:26-27: "26 'And when your children say to you, "What do you mean by this service?" 27 you shall say, "It is the sacrifice of the LORD's Passover, for he passed over the houses of the people of Israel in Egypt, when he struck the Egyptians but spared out houses."' And the people bowed their heads and worshiped."
Psalm 105:43: "So he brought his people out with joy, his chosen ones with singing."
1 Corinthians 5:7-8: "7 Cleanse out the old leaven that you may be a new lump, as you really are unleavened. For Christ, our Passover lamb, has been sacrificed. 8 Let us therefore celebrate the festival, not with the old leaven, the leaven of malice and evil, but with the unleavened bread of sincerity and truth."
Revelation 7:9-12: "9 After this I looked, and behold, a great multitude that no one could number, from every nation, from all tribes and peoples and languages, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands, 10 and crying out with a loud voice, 'Salvation belongs to our God who sits on the throne, and to the Lamb!' 11 And all the angels were standing around the throne and around the elders and the four living creatures, and they fell on their faces before the throne and worshiped God, 12 saying, 'Amen! Blessing and glory and wisdom and thanksgiving and honor and power and might be to our God forever and ever! Amen.'"
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The text is public domain:
The day of resurrection!
Earth, tell it out abroad,
The passover of gladness,
The passover of God.
From death to life eternal,
From sin's dominion free,
Our Christ has brought us over
With hymns of victory.
Let hearts be purged of evil
That we may see aright
The Lord in rays eternal
Of resurrection light
And, list'ning to His accents,
May hear, so calm and plain,
His own "All hail!" and, hearing,
May raise the victor strain.
Now let the heav'ns be joyful,
Let earth its song begin,
Let all the world keep triumph
And all that is therein.
Let all things, seen and unseen,
Their notes of gladness blend;
For Christ the Lord has risen,
Our joy that has no end!
All praise to God the Father,
All praise to God the Son,
All praise to God the Spirit,
Eternal Three in One!
Let all the ransomed number
Fall down before the throne
And honor, pow'r, and glory
Ascribe to God alone!
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The first three Biblical citations all seem to appear in the first verse. The Exodus verses provide background on the Passover, and "Our Christ has brought us over / With hymns of victory" has the same structure and idea as Psalm 105:43.
"Let hearts be purged of evil" at the beginning of the second verse seems to come from "Cleans[ing] out the old leaven" from 1 Corinthians 5:7.
Revelation 7:9-12 appears in the last two verses, specifically: 9-10 in the third verse and 11-12 in the fourth.
