John 1:29: "The next day he [John the Baptist] saw Jesus coming toward him, and said, 'Behold, the Lamb of God, who takes away the sin of the world!'"
Revelation 7:14: "I said to him, 'Sir, you know.' And he said to me, 'These are the ones coming out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb.'"
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The text from John seems to appear in the first verse: "Your only Son, no sin to hide, / But You have sent Him from Your side / To walk upon this guilty sod, / And to become the Lamb of God." The appellation "Lamb of God" also appears throughout the hymn.
The text from Revelation appears in the line "O wash me in His precious blood" in the refrain.
"To be led by Your staff and rod" in the third verse comes from Psalm 23:4: "Even though I walk through the valley of the shadow of death, I will fear no evil, for you are with me; your rod and your staff, they comfort me."
