I'm looking for the origin of the phrase, "eat babies for breakfast".

I found this in "The Jungle Tales of Tarzan," by Edgar Rice Burroughs:

"My mother was a voodoo, my father was a snake; I live upon lions'
hearts and the entrails of the panther; I eat young babies for
breakfast and the demons of the jungle are my slaves. I am the most
powerful witch-doctor in the world; I fear nothing, for I cannot die."

This was published in 1919.