Mas’ala 36377المبسوطHanafivol. 15, p. 120vol. 15, p. 120 وَالشَّرْطُ الْمُفِيدُ فِي الْعَقْدِ مُعْتَبَرٌ، Read the whole chapterCopy with source On the map: GuaranteeCompare