Relatives in Islam and Christianity presents a thoughtful comparative study of the role of extended family relationships within the moral teachings of Islam and Christianity. As the fifth volume in the series The Family Institution in Islam and Christianity, the book forms part of a broader exploration of the ethical foundations of family life as articulated in the sacred scriptures of the two Abrahamic traditions. While much discussion of family focuses on the immediate household, this volume broadens the perspective to consider the wider network of relatives that surrounds and supports the family unit. Through scriptural references from the Qur'an, Hadith literature, and the Bible, the book examines the importance of maintaining kinship ties, the responsibilities individuals owe to their relatives, and the spiritual significance of preserving family bonds. Both Islam and Christianity place considerable emphasis on kindness toward relatives, mutual assistance within the family, and the preservation of harmony among kin. The work highlights how these teachings encourage compassion, cooperation, and solidarity among extended family members, thereby strengthening social cohesion and moral responsibility across generations. By presenting the teachings of the two traditions side by side, Relatives in Islam and Christianity reveals the shared ethical vision that underpins both faiths regarding the preservation of family ties. The book demonstrates that maintaining strong kinship relationships is not merely a social preference but a moral and spiritual duty deeply rooted in religious teaching. Scholarly yet accessible, this volume offers valuable insights for readers interested in comparative religion, family ethics, and the enduring role of kinship in shaping healthy societies.