Ubaidul Haq

At a conference on 1 April 2005, organised in Paltan Maidan, Dhaka by the Jamiat-e-Ulema-e-Islam he along with the leading ulema of India, Pakistan and Bangladesh declared a fatwa denouncing terrorism.

In 2005, following the series of bombings by the banned outfit Jama'atul Mujahideen Bangladesh (JMB) while leading the protest denouncing terrorism he remarked:

On March 21, 2003, he led a large anti-war rally in protest of the invasion of Iraq with Fazlul Haque Amini, where he remarked that:

He was the longest serving khatib of Baitul Mukarram, the national mosque of Bangladesh. In 2001, he was forced into retirement by the then Awami League government. He then sought a writ petition which overturned the government's decision.

In 1994, he expressed concern over the growing support for the unfair practices of Christian proselytizers by non-governmental organisations and the sympathy for them by Bangladeshi left-wing political parties.

Obaidul Haq started his career as a teacher in joined Dhaka's Hossainya Ashraful Ulum Madrasa near Bara Katra from 1949, teaching hadith studies. In 1953, he began teaching at the Nanak Wara Madrasa in Karachi. He returned to Bengal in 1954, joining as a teacher at the Dhaka Alia Madrasa, where he taught hadith studies between until 1971 and served as the additional vice principal from 1973 through 1979. He was the Shaikhul Hadith at Chittagong's Patia Madrasa between 1986 and 1987, and held the same position at Sylhet's Jamia Qasimul Uloom Dargah Madrasa from 1987 until his death.

Haq first studied at the Ghungadi Madrasah where he was taught Persian books such as Mizan Munshaib by Maulana Shamsul Haq. Two years later, he studied at a madrasa in Habiganj under Mawlana Muddathir Ahmad and Mawlana Musir Ali - both graduates of the Darul Uloom Deoband. Haq then studied at Munshibazar Ayargaon Madrasa, founded by his father. In 1942, he enrolled in Darul Uloom Deoband and received his vocation in Tafsir and Hadith from Husain Ahmad Madani and Muhammad Ilyas Kandhlawi.

Ubaidul Haq (Bengali: উবায়দুল হক; 2 May 1928 – 6 October 2007), also spelt Obaidul Haq (Bengali: ওবাইবদুল হক), was a Bangladeshi teacher, muhaddith, mufassir and writer. He was the former khatib of the national mosque of Bangladesh.

Obaidul Haq was born on 2 May 1928 into a traditional Bengali Muslim family in Barothakuri, Zakiganj, Sylhet District. His father, Maulana Zahurul Haq was a notable student of Ashraf Ali Thanwi and graduated in Hadith studies from the Darul Uloom Deoband in 1335. His mother was Musammat Aisha Begum. Haq was the second son out of three sons. His elder brother, Ahmadul Haq, collected old books and was the owner of a store known as the Ashrafiyyah Kutubkhana, which opened in Zindabazar, Sylhet not long after the Independence of Bangladesh in 1971. His younger brother, Mawlana Abdul Haq (1930-2022), was a graduate of the Government Madrasah-e-Alia in Dhaka and is a teacher of Hadith at a Qaumi Madrasa.