Ahmad ibn Abi Bakr ibn Muhammad al-Mustafa, known as Abu Zakariya ar-Rigasi, born in the Rigasa town, Kaduna State, Nigeria. He worked as a teacher and author, and has many very useful works in various fields of Islamic sciences, between the text and the explanation, including for example: 1- Al-Futuhat al-Rahmaniyyah, explaining Umdat al-Ahkam, in three volumes. 2- Noor Ala Noor in the biography of the bearer of the banner of honor and glory, peace and blessings be upon him, one volume. 3- The jurisprudence of purification and prayer in light of the Qur’an and Sunnah, one volume of more than four hundred and seventy pages. 4- Taqrib al-Maqasid, explaining Mukhtasar al-Akhdari in light of the Qur’an and Sunnah, one volume. 5- Clarification of issues, explaining the introduction to al-Ashmawiya. 6- Al-Kawakib al-Wamidhiyyah, explaining the introduction to the creed of al-Risalah al-Qayrawaniyah. 7- Al-Mawaahib al-Rabbaniyyah, explaining the hadith of Umm Zar