Jalāl Mujarrad Kunyāʾī, popularly known as Shah Jalal, was a celebrated Sufi figure of Bengal. His name is often associated with the Muslim conquest of Sylhet and the Spread of Islam into the region, part of a long history of interactions between the Middle East, Central Asia, and South Asia. Various complexes and religious places have been named after him, including the largest airport in Bangladesh, Hazrat Shahjalal International Airport and numerous mosques around the United Kingdom.

The Conquest of Sylhet predominantly refers to an Islamic conquest of Srihatta led by Sikandar Khan Ghazi, the military general of Sultan Shamsuddin Firoz Shah of the Lakhnauti Sultanate, against the Hindu king Gour Govinda. The conquest was aided by a Muslim saint known as Shah Jalal, who later ordered his disciples to scatter throughout eastern Bengal and propagate the religion of Islam. The Conquest of Sylhet may also include other minor incidents taking place after Govinda's defeat, such as the capture of nearby Taraf.