Mas’ala 1009الأمShafi'ivol. 1, p. 121vol. 1, p. 121 ثُمَّ شَكَّ هَلْ دَخَلَهَا بِنِيَّةٍ أَمْ لَا، Read the whole chapterCopy with source On the map: PrayerCompare