Bayān ibn Samʿān at-Tamīmī an-Nāhdī (Arabic: بيان بن سمعان التميمي النهدي) was the founder of the 8th-century Bayaniyya sect of Shi'a Islam, as well as a claimant to prophethood.
According to the Shi'ite theologian Abu Muhammad al-Hasan ibn Musa al-Nawbakhti, Bayan ibn Sam'an was a Shi'ite of the Ghulat who supported Abu Hashim as a rightful caliph, but later claimed prophethood after Abu Hashim died.
[1][4] Bayan ibn Sam'an was executed for his beliefs, which the majority of the Muslim scholars considered to be heretical at the time.
[1][3] His execution was performed by the governor of Iraq, Khalid al-Qasri at Kufa in the year 737.
[3][4] It is narrated in Bihar al-Anwar that Bayan ibn Sam'an was set on fire, resulting in him being burnt to death.