This article collects and analyses passages about male and female domestic slaves in the Persian Rivāyats. The Rivāyats consist of correspondence between Iranian and Indian Zoroastrians (Parsis) from the late fifteenth to the eighteenth centuries ce. In these letters, Parsis sought the opinions of Iranian Zoroastrians on various doctrinal and ritual issues. The passages in question cover a range of subjects, including the issue of converting household slaves to Zoroastrianism, their participation in domestic religious ceremonies, the exposure of their dead bodies in the towers of silence, and marrying female slaves. These references to slaves challenge the conventional narrative that pre-modern Zoroastrians were oppressed, marginalized, and poor communities. This narrative has overshadowed these pieces of evidence and has caused them not to be studied seriously. This paper seeks to go beyond this traditional reconstruction by examining these texts based on their context. The passages reflect the actual socio-religious issues of Zoroastrians, especially Parsis, and demonstrate their participation in the slave-owning milieu of late medieval and early modern Gujarat and Iran rather than mere anachronistic elements or rhetorical tools reflecting a scholastic treatment of a defunct legal question.