Digging of Nahr Adi

Al-Baladhuri reports that Adi ibn Artat, the governor of Basra for Umar ibn Abd al-Aziz, ordered its people to write in the digging of a canal for them. Wakî' ibn Abi Sawd wrote to him that if he did not dig them a canal, Basra would not be a home for them. ¹

Al-Baladhuri says it was said that Adi intended by this to harm Bahz ibn Yazid ibn al-Muhallab, and it benefited him instead. Umar wrote to permit him, and he dug the canal of Adi from the breach of Shirin. People came out to look at it, and Adi carried al-Hasan al-Basri onto a dam that was there, and kept pointing. ¹

The file gives no date for the digging: an additional source is needed.