Al-Harith ibn Murra al-Abdi (), was from the Rabi'a branch of the Abd al-Qays tribe, and is known for his service as the Qadhi (chief justice) of Sindh during the caliphate of Uthman ibn Affan, al-Abdi was also a notable military leader. He led campaigns into Balochistan with a contingent of 1,000 warriors and was involved in significant military operations against Sindhi bandits. He was killed while investigating murders at the behest of Ali ibn Abi Talib.
Al-Harith belonged to the Rabi'a branch of the Abd al-Qays tribe. His tribe was prominent in the early Islamic community, contributing many members to the Islamic cause.
During the caliphate of Uthman ibn Affan, Harith ibn Murrah al-Abdi served as the Qadhi (chief justice) of the Sindh region.
al-Abdi was instrumental in expanding the influence of Islam into the far southeastern provinces. He, along with his 1,000 warriors, advanced into the territory of Balochistan, furthering the reach of the Islamic state. Alongside Sayfi ibn Fil 'al-Shaybani, another officer of Ali's army, Harith ibn Murrah al-Abdi attacked Sindhi bandits.
The historians note the first raid Al-Baladhuri, Ibn Sa'd and Khalifah ibn Khayyat to have taken place in 658 CE. Kaikan was known as al-Qiqan to them and was located near Quetta. Where al-Abdi and Sayfi ibn Fil al-Shaybani had participated in this first raid.
al-Abdi was also entrusted with investigating significant matters of the state. For instance, during Ali ibn Abi Talib reign, he sent him to investigate the murders of individuals such as Khabbab ibn al-Aratt and his pregnant bondmaid. Where there, during these investigations, al-Abdi was killed.