Who is Al-Hafiz Al-Dumyati and what is his book "Al-Matjar Al-Rabih fi Thawab Al-'Amal Al-Salih"?

Al-Hafiz Al-Dimyati is one of the great memorizers of Hadith, Qur'an reciters, and Shafi'i jurists. He was born in Damietta in the seventh century AH and died in 705 AH. He acquired knowledge of Hadith from Al-Hafiz Al-Mundhiri and Qur'anic recitations from Al-Kamal ibn Al-Darir. Among those who studied under him were Al-Nawawi, Al-Subki, and Al-Mizzi. One of his most important works is "Al-Matjar Al-Rabih" (The Profitable Trade), in which he mentions verses and Hadiths concerning the virtues of deeds, following a methodology that distinguishes between accepted and defective Hadiths. Some scholars may disagree with his rulings on Hadiths. The book is one of the best for beneficiaries, but "Riyadh Al-Salihin" by Al-Nawawi is sounder than it, and "Kitab Al-Targhib" by Al-Mundhiri is more comprehensive than it.