"Our gods are dead."

"Homefront". Kira Nerys muses for a bit about the Prophets (the beings who live in the Bajoran wormhole and are worshiped by the Bajorans), prompting Worf to remark that "Our gods are dead. Ancient Klingon warriors slew them a millennia [sic] ago. They were more trouble than they were worth."

Example of:
God Is Dead