Integrating Islam and Local Culture: An Islamic Ethical Framework in the Marsiadapari Toba Tradition

This research is about the Marsiadapari tradition of the Toba Batak community based on Islamic ethical framework to identify the meeting point between local environmental wisdom and Islamic ethics. Marsiadapari embodies assistance and resilience. It is a cultural arrangement for environmental balance and social harmony among the people. This is qualitative-descriptive research, and it is an examining text on Qur’anic principle; rahmah, mizan, and khalifah as well as ethnography research on local community. The results show that Marsiadapari subscribes to normative values that are aligned with Islamic environmental ethics; the sustainability culture of a community can be linked to its Islamic theology. This integration proposes a faith- and indigenous identity-based model for environmental action, contributing to the ongoing discussions on sustainability, decolonial theology and contextual Islamic praxis. Ultimately, the study proposes the Marsiadapari tradition as a culturally rooted, faith-inspired framework for strengthening inter-community harmony and environmental responsibility in plurality. This synthesis of ideas confirms that Islam can use local customs to encourage ethical behaviour towards the environment.