Verified Source
The Collection
Conditions of Supplication and Barriers to Answering in Light of the Quran and Sunnah
شروط الدعاء وموانع الإجابة في ضوء الكتاب والسنة
Shurūṭ al-Duʿāʾ wa-Mawāniʿ al-Ijāba fī Ḍawʾ al-Kitāb wa-l-Sunna
Sa'id bin Wahf al-Qahtani