1 Corinthians 10:4: "and all drank the same spiritual drink. For they drank from the spiritual Rock that followed them, and the Rock was Christ."
John 19:34: "But one of the soldiers pierced his side with a spear, and at once there came out blood and water."
Hebrews 9:14: "how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, purify our conscience from dead works to serve the living God."
Ezra has only ten chapters; the intended citation seems to be Ezekiel 36:25: "I will sprinkle clean water on you, and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you."
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The text is public domain:
1 Rock of Ages, cleft for me,Let me hide myself in Thee;Let the water and the blood,From Thy riven side which flowed,Be of sin the double cure:Cleanse me from its guilt and pow'r.2 Not the labors of my handsCan fulfill Thy Law's demands;Could my zeal no respite know,Could my tears forever flow,All for sin could not atone;Thou must save, and Thou alone.3 Nothing in my hand I bring;Simply to Thy cross I cling.Naked, come to Thee for dress;Helpless, look to Thee for grace;Foul, I to the fountain fly;Wash me, Savior, or I die.4 While I draw this fleeting breath,When mine eyelids close in death,When I soar to worlds unknown,See Thee on Thy judgement throne,Rock of Ages, cleft for me,Let me hide myself in Thee.
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1 Corinthians 10:4 appears in the title "Rock of Ages" in first and fourth verses. John 19:34 is combined with this in the description "cleft for me" and also appears in the middle of the first verse: "Let the water and the blood, / From Thy riven side which flowed." Hebrews 9:14 and Ezekiel 36:25 round out the rest of the first verse ("Let the water and the blood... Be of sin the double cure: / Cleanse me from its guilt and pow'r") and are briefly alluded to again in the third ("Foul, I to the fountain fly; / Wash me, Savior, or I die.").