Kumayl bin Ziyad an-Nakha'i (Arabic: كُميل بن زياد النخعي) a companion of Muhammad, and later Ali, the final Sunni Rashidun Caliph and first Shi'a Imam. He is best known for the du'a or supplication in the Shi'a anthologies that bears his name, du'a Kumayl .
Kumayl fought alongside Sa'id ibn Jubayr at the battle of Jamājim in 82 AH (699-701 CE) against the provincial governor of the Iraqi region, al-Hajjaj ibn Yusuf al-Thaqafi. Kumayl commanded the ‘Battalion of Qur’an Reciters’.
The shrine of Kumayl is in Kufa, Iraq.