Though your sins be as scarlet, they shall be as white as snow.
Isaiah 1:18

Words: Mary A. Kidder, in Sunday School Songs, edited by Elisha A. Hoffman (Cleveland, Ohio: Publishing House of the Evangelical Association, 1880), number 74.
Music: Andhra Pradesh Joseph Garrison (🔊 pdf nwc).
If you know where to get a good photo of Garrison (head & shoulders, at least 200×300 pixels),
Fear not, little flock,
says the Savior divine,
The Father has willed that the kingdom be thine;
Oh! soil not your garments with sin here below,
My sheep and My lambs must be whiter than snow.
Refrain
Look up, O my brother! and be not cast down,
While bearing the cross, you are sighting the crown;
Go, wash in the fountain, while waiting below—
Your sins shall, though scarlet, be whiter than snow.
Far whiter than snow, and as fair as the day,
For Christ is the fountain to wash guilt away;
Oh, give Him, poor sinner, that burden of thine,
And enter the fold with the ninety and nine.
Refrain
Yon sheep that was lost in the valley of sin,
Was found by the shepherd, who gathered him in;
With songs of thanksgiving the hills did resound,
My friends and my neighbors, the lost sheep is found.
Refrain
Ride over temptations, and cease your alarms;
Your shepherd is Jesus, your refuge His arms;
He’ll never forget you, a brother and a friend,
But love you, and save you in worlds without end.
Refrain