Shāh Jalāl Mujarrad Kunyāʾī (شيخ جلال مجرد كنيائي), popularly known as Shah Jalal (Bengali: শাহ জালাল, romanized: Śah Jalal, IPA: [ˈʃaˑ ˈdʒalal]), was a celebrated Sufi Saint, conqueror and historical 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, Shahjalal University of Science and technology (SUST) and numerous mosques around the United Kingdom.

Jalal was said to have been born on May 25, 1271. Various traditions and historical documents differ in his place of birth, and there is a gap of two centuries between the life of the saint and literature which attempted to identify his origin. Local ballads and devotees continue to refer to him as Shah Jalal Yemeni, connecting him to Greater Yemen Specifically from the Hadhramaut region. An inscription from circa 1505 AD, during the reign of Sultan Alauddin Husain Shah, refers to Shah Jalal with the suffix Kunyāʾī. Towards the end of this century, in 1571, Shah Jalal's biography was recorded in Shaikh ʿAli Sher Bangālī's Sharḥ Nuzhat al-Arwāḥ (Commentary on the excursion of the souls). The author was a descendant of one of Shah Jalal's senior companions, Nūr al-Hudā, and his account was also used by his teacher Muḥammad Ghawth Shattārī in his Gulzar-i-Abrār of 1613. According to this account, Shah Jalal had been born in Turkestan, where he became a spiritual disciple of Ahmad Yasawi. Muḥammad Nāṣiruddīn Ḥaydar composed a full biography of Shah Jalal titled Suhayl-i-Yaman Tārīkh-i-Jalālī in 1859, which referred to him as Yemeni. Although this was composed 5 centuries after Jalal's death, Haydar's work consulted two now-lost manuscripts; Risālah (Message) by Muḥīuddīn Khādim from 1711 and Rawḍah as-Salāṭīn (Garden of the Sultans) from 1721.

A number of scholars have claimed that the suffix from the Husain Shahi inscription refers to the city of Qūniyah (Konya) in modern-day Turkey (then in the Sultanate of Rum), and they stated further that Jalal may have possibly moved to Yemen in his later life. Others have linked the suffix to the village of Kaninah in Yemen's Hadhramaut region, and some even to Kenya in East Africa.

His mother, Syeda Haseenah Fatimah, and his father, Sayyid Mahmud ibn Muhammad ibn Ibrahim, are claimed to be descendants of the Quraysh tribe in Makkah. His mother was the daughter of Jalaluddin Surkh-Posh Bukhari. Jalal's father was a cleric and contemporary of the Sufi mystic Rumi and died five years after his son's birth. Jalal was educated and raised by his maternal uncle, Syed Ahmad Kabir Suhrawardi. in Makkah. He excelled in his studies; became a hafiz and mastered fiqh. He became a makhdoom, teacher of Sunnah and, for performing prayers in solitary milieu and leading a secluded life as an ascetic, al Mujarrad was post-fixed to his name. It is claimed he achieved spiritual perfection (Kamaliyyat) after 30 years of study, practice and meditation.

Jalal's maternal uncle, Syed Ahmad Kabir, gave him a handful of soil and asked him to travel to the Indian subcontinent. He instructed him to choose to settle and spread Dawah in any place in India where the soil exactly matches that which he gave him in smell and colour. Shah Jalal journeyed eastward from Makkah and met many great scholars and Sufi mystics. Sheikh Ali of Yemen gave up his duty as a prince to join Jalal on his expedition. Many people joined Jalal from the Arabian Peninsula including his nephew Shah Paran. Jalal also came across Sheikh Chashni Pir, a pedologist who would check the soil of the places that Shah Jalal would visit in order to find the matching soil given by Sheikh Ahmad Kabir. Jalal passed through Baghdad and was present there during the time of the murder of the last Abbasid caliph Al-Musta'sim in 1258. Driven off by the Mongol invasion of Baghdad, they continued journeying to the east.

Jalal reached Uch in the Punjab, where he and many of his companions were initiated into the Sufi order of Suhrawardiyya. Jalal was joined by many other disciples throughout his journey. He passed through Delhi where he was made a guest of the Sufi saint Nizamuddin Auliya. Nizamuddin offered him a gift of two rare pigeons which would later be called Jalali Kobutor (Pigeons of Jalal). It is said that these pigeons continue to breed and its descendants remain around Jalal's dargah.

In 1303, Sultan Shamsuddin Firoz Shah of Lakhnauti was engaged in a war with the neighbouring Gour Kingdom in the Sylhet region, then under the rule of the Hindu king Gour Govinda. This began when Shaykh Burhanuddin, a Muslim living in Sylhet, sacrificed a cow for his newborn son's aqiqah (birth celebration). Govinda, in a fury for what he saw as sacrilege, had the newborn killed as well as having Burhanuddin's right hand cut off.

When word of this reached Sultan Firoz Shah, an army commanded by his nephew, Sikandar Khan and later his Sipah Salar (Commander-in-chief) Syed Nasiruddin, was sent against Gour. Three successive strikes were attempted, all ending in failure due to the Bengali armies inexperience in the foreign terrain as well as Govinda's superior military strategy.