This article examines how the Indonesian Congress of Women Ulama (Kongres Ulama Perempuan Indonesia, KUPI) sustains faith-based community organizing through the interaction of social and spiritual capital. Drawing on a qualitative case study, using interviews, organizational and digital documents, and observations of KUPI activities, it analyses the movements of pesantren-based relationships, collective religious deliberation, and connections across community, civil-society, and institutional settings. The findings suggest that bonding ties formed through pesantren genealogies and long-term cadre programs provide trust and continuity; religious deliberation and shared Islamic commitments give collective action meaning and legitimacy; and bridging and linking relationships extend collaboration while requiring ongoing negotiation with external institutions. The analysis also identifies tensions, including uneven volunteer workloads, generational barriers, and constraints in digital reach and institutional cooperation. The article proposes “ecosystemic social-spiritual capital” as an analytical concept for understanding how relational and spiritual resources interact across a distributed organizing network. The concept is grounded in KUPI’s Indonesian context and is not presented as a universal model.
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