923) they took and ransacked Basra; in the first month of the following year the great pilgrim caravan on its return from Mecca was overpowered; 2500 men perished, while an even larger number were made prisoners and brought to Lahsa, the residence of the Carmathian princes, together with an immense booty.
Abu Sa`id al-Jannabi, who had founded a Carmathian state in Bahrein, the north-eastern province of Arabia (actually called Lahsa), which could become dangerous for the pilgrim road as well as for the commerce of Basra, in the year 900 routed an army sent against him by Motadid, and warned the caliph that it would be safer to let the Carmathians alone.
By a timely sortie, preceded by the administration of bribes to various officers in the Carmathian host, Jauhar succeeded in inflicting a severe defeat on the besiegers, who were compelled to evacuate Egypt and part of Syria.
In August 977 Aziz met the united forces of Aftakin and his Carmathian ally outside Ramleh in Palestine and inflicted a crushing defeat on them, which was followed by the capture of Aftakin; this able officer was taken to Egypt, and honorably treated by the caliph, thereby incurring the jealousy of Jacob b.
Abu Sa`id was assassinated (913) in his palace at aahsa (which in 926 was fortified and became the Carmathian capital of Bahrein).