There's a new song by Bailey Zimmerman called Religiously, but he's singing about not having the woman who believed in him religiously. Might still be the one you're looking for.
Sorry, I had my songs mixed up. Try Golden Slumbers from the Sgt Peppers movie. The starting lyrics were, “once there was a way to get back homeward. Once there was a way to get back home. Sleep pretty darling do not cry, and I will sing a lullaby.more »