Teungku Haji Muhammad Amin Mahmud, known as Abu Tumin or Abu Tu Min, was born on 17 August 1932 at Kuala Jeumpa, Bireuen. He studied at his family's dayah at Pulo Reudeup, then for about seven years under Abuya Muda Waly at the Dayah Darussalam Labuhan Haji, and also with Teungku Hasan Krueng Kale. From his return in 1959 he taught at and later led the Dayah al-Madinatuddiniyah Babussalam at Blang Bladeh, founded by his grandfather in 1890. He chaired PERTI Aceh's consultative council (2002–2012), sat on the elders' council of the Aceh Ulama Council, advised HUDA and served on the Tuha Peut council of the Wali Nanggroe institution (2016–2026), and was revered as one of Aceh's most influential senior ulama. He died on 27 September 2022.