Was Elohim the Saviour and Redeemer of his world?

According to Mormon doctrine, God the Father (Elohim), once lived a mortal life. > **“As man now is, God once was; as God is now man may be.”** ( The > Teachings of Lorenzo Snow, ed. Clyde J. Williams , 1.) Years ago I remember being told that God the Father did not live simply as another man, but that he was in fact the Saviour and Redeemer of his world, much as Christ is the Saviour and Redeemer of ours. He lived a sinless life, like Christ, and suffered for the sins of all his brothers and sisters. I confess that I've never bothered to look into the sources behind this claim, but now I'm wondering, who said this? Which church leader is credited with revealing this? I'm not necessarily asking for a *canonical* LDS source, I just want to know where this claim comes from, be it Journal of Discourses, a letter, hear-say, or wherever.