But there are still other superstitions whose secrets must be revealed: ... to make you aware that in these pagan religions again it is the deaths of human beings that have been hallowed by worship.
Sed adhuc supersunt aliae superstitiones, quarum secreta pandenda sunt, ... ut et in istis profanis religionibus sciatis mortes esse hominum consecratas.
Original text (Latin)
Notes from Wikiquote
De errore profanarum religionum, ch. 6, sec. 1. Translated by Clarence A. Forbes, The Error of the Pagan Religions (Newman Press, 1970) p. 54. Latin, without translation, in J. G. Frazer, The Golden Bough (1890) vol. 1, ch. 3, epigraph