Application of Waqf in Modern Islamic Boarding School Darussalam Gontor, Ponorogo Regency in the Perspective of Sharia Economic Law and Law Number 41 of 2004 concerning Waqf Journal title: Al-Muamalat: Jurnal Ekonomi Syariah Authors: Fikfik Taufik, Yusi Aprillillah Subject(s): Economics, Law and Economics, Economic Law, Middle East and Islamic Law