This article examines the practices and discourses surrounding the ikrar oaths by which some Alevis in Turkey and the Turkish diaspora are initiated into their spiritual path. I examine a contemporary revival of this Alevi oath complex, which is a historical product of the same messianic trends in post-Mongol Sufism that shaped the Mughal imperial idea of sulh-i kull, or ‘Peace with All’ religions. I argue that the ikrar oaths are paradigmatic examples of ‘post-Islam’ or Islam after the messianic suspension of its scriptural law. I show how Alevis seek to maintain their suspension of monotheism through ritual practices of animal sacrifice and music as well as the replacement of standard monotheistic oaths with post-Islamic oaths. Focusing on a recent liturgical reform movement led by the shrine of Hacı Bektaş in central Turkey, I demonstrate how the shrine works to maintain Alevis’ suspension of monotheism within the constraints of modern secularism, in part by reinterpreting secular constraints in terms of post-Islamic Alevi values, thereby highlighting elective affinities between post-Islam and secularism.