The author of this book, Shaykh (may Allah سبحانه وتعالى have mercy on him), states: "I have compiled the chains of transmission for the causes (and wisdoms) of Hajj, which I will mention here, as narrated from the Prophet (peace and blessings be upon him and his family) and the Imams عليه السلام, in my book titled Jami‘ ‘Ilal al-Hajj (The Compilation of the Causes of Hajj)."
Commentary #1