[1] Abdul Momin was born in 1930, to a Bengali Muslim parents Muhammad Abdus Sattar and Gulbahar Bibi in the village of Purangaon in Nabiganj, Habiganj subdivision (then located under the Sylhet district).

After the death of Ashraf Ali Bishwanathi in 2005, a joint conference was held on 4 September between the Jamiat's working council and shura in which Imambari was elected as the president of the nationwide political party.

[4] In 2017, he inaugurated a rally on the road from Sylhet to Teknaf in solidarity with the Rohingyas who had escaped Myanmar as a result of religious persecution.

[1][2][3] Muhiuddin Khan was his disciple, and Ubaydullah Faruq pledged bay'ah to him during his lifetime, eventually becoming his khalifah (spiritual successor).

[7] A dua ceremony was held at the Jamia Madania madrasa of Bishwanath dedicated to Imambari on 27 September 2020, organised by Shibbir Ahmad Bishwanathi and Hasan bin Fahim.