This study aims to analyze the legitimacy of the mappacci tradition from the perspective of Islamic law through the concept of ‘urf and to examine its conformity with the principles of Islamic marriage law. The research method used is normative legal research with a qualitative, conceptual, and socio-legal approach through library research on primary Islamic legal sources and scholarly literature concerning the Bugis marriage tradition. The analysis was conducted by identifying the forms, meanings, and functions of the mappacci tradition and examining them based on the concepts of ‘urf, uṣūl al-fiqh, qawā‘id fiqhiyyah, and the legal maxim al-‘ādah al-muḥakkamah. The results show that the mappacci tradition meets the criteria of ‘urf ṣaḥīḥ because it has been continuously practiced and socially accepted by the Bugis community, contains values of self-purification, respect for parents, prayer, moral preparation, kinship, and social solidarity, and does not fundamentally contradict the Qur’an, Sunnah, tawḥīd, or the objectives of Islamic law (maqāṣid al-sharī‘ah). The mappacci tradition is also more appropriately positioned as a social and cultural practice within marriage rather than ‘ibādah maḥḍah, meaning that its absence from the practices of the Prophet does not automatically constitute bid‘ah. In conclusion, the mappacci tradition is legally permissible and may be maintained as a Bugis cultural tradition within Islamic marriage practices, provided that its implementation remains free from shirk, khurafat, superstition, prohibited elements, and beliefs that contradict the principles of Islamic law.
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