Sirru al-Asrāri fī Dhikri al-Ṣalāti ʿalā al-Nabiyyi al-Mukhtār ﷺ: the Secret of Secrets concerning Invocation Blessings upon Chosen Prophet ﷺ

The Secret of Secrets concerning the Invocation of Blessings upon the Chosen Prophet ﷺ is a bilingual Arabic-English devotional work by the Sudanese Sufi master Shaykh Aḥmad al-Ṭayyib ibn al-Bashīr, one of the foremost transmitters of the Sammāniyya path. Centred upon the spiritual meaning, virtues and proper etiquette of sending blessings upon the Prophet Muḥammad ﷺ, the book presents Ṣalāt Sirr al-Asrār together with the Ṭayyibiyyah Prayers, additional prophetic invocations, Qur'anic passages, supplications and protective litanies, often accompanied by transliteration. Its teachings describe the Prophet ﷺ as the supreme guide, the fountain of spiritual knowledge and the divinely appointed means through whom seekers receive mercy, illumination and nearness to Allah. The collection encourages reverence, inward presence, sincere love and regular recitation as means of purifying the heart, strengthening faith and entering the luminous Muhammadian presence, while its biographical material records the author's education, spiritual authority, relationship with Shaykh Muḥammad al-Sammān and influential role in spreading the Sammāniyya throughout Sudan and neighbouring lands.