The original song is:

POWER IN THE BLOOD

(Lewis E. Jones)

Would you be fee from the burden of sin?
There is Power in the blood, power in the blood!
Would you be free from your passion and pride?
There is Power in the blood, power in the blood!

There is power, power,
Wonder working power,
In the blood,
Of the Lamb!
There is power, power,
Wonder working power,
In the precious blood of the Lamb.

Would you be whiter, much whiter than snow?
Would you do service to Jesus, your King?

Would you o'er evil a victory win?
Come for a cleansing to Calvary's tide.

This appears to be a hymn, but I can't find it on Cyber-Hymnal, or with the Pentecostals. Maybe a bit off the beaten track. Or maybe it was once more common than today. For the Joe Hill version, klik here.