Mas’ala 5568الأمShafi'ivol. 2, p. 118vol. 2, p. 118 وَإِذَا جَعَلَ لِلَّهِ عَلَيْهِ اعْتِكَافَ شَهْرٍ سَمَّاهُ، Read the whole chapterCopy with source On the map: Retreat in the mosqueCompare