Note 532 — Chapter XXXIX · BATTLE OF SIFFIN. A.H. XXXVI., XXXVII. A.D. 657.
Reading edition
Thus the first day Ashtar was in command against Habîb ibn Maslama; then Hâshim ibn Otba (the hero of Câdesîya) against Abul Aûr; on the third day Ammâr against one of Amru’s sons, and so on. After six days the turn came round again to Ashtar and Habîb. But it all reads somewhat too made up.