This chapter surveys pagan, Christian, and early Islamic attitudes to dream divination and oracles, and the associated practice of incubation at shrines that continued from Antiquity in a religious guise. Divine messages received in oracular dreams in the pagan, Judaeo-Christian, Graeco-Roman, and early Islamic traditions required specialist interpreters and specific locations for gaining privileged access to the divine. It shows how the pagan practices of consulting oracles and sleeping at shrines were adopted and adapted by Byzantine Christians and early Muslims. The first half of the chapter deals with the pagan and monotheist reliance on oracles. Oracles came in many shapes and sizes, but one thing they had in common across the various religious traditions was a starring role for women. Oracles were usually delivered in a state of ecstatic frenzy, the sign of possession by a god or a demon. The process of dream incubation also involved visitations by a god or a saint, gained by sleeping at a holy place, temple, or shrine. The second half of the chapter examines pagan records of the practice of incubation, before discussing how this tradition was transformed in the miracle collections of male and female saints in the Byzantine milieu, where it attained spiritual overtones. The limited evidence for incubation in the Talmud will be treated, as well as early Islamic incubation practices.