The Messenger of Allâh (peace be upon him) ordered his uncle Al-‘Abbas — who was a sonorous voiced man — to call out on the followers. As loudly as he could, Al-‘Abbas shouted: “Where are the lancers?” “By Allâh,” Al-‘Abbas said, “Upon hearing my voice calling them back, they turned round to the battlefield as if they had been oryxes (wild cows) tending towards their calves.”
“Here we are, at your service. Here we are. ” They said. There you see them trying to stop their camels and reverse to the battle. He who was unable to force his camel to turn back, would take his armour, fling it round his neck, and hastily dismount his camel with his weapon in his hand letting his camel move freely and run towards the voice source. Voices would grow louder and louder till a hundred of them gathered round the Prophet and resumed the fight.
Those who were called out upon next were Al-Ansar, the Helpers, “O, folks of Al-Ansar! Folks of Al-Ansar!”
The last group to be called out upon were Bani Al-Harith bin Al-Khazraj. Muslims battalions poured successively into the battlefield in the same manner that they had left it. The stamina of both parties was superb. Both of them stoodfast and fought fiercely. The Messenger of Allâh (peace be upon him) was so eagerly and furiously watching the battle that he said:
“Now the fight has grown fierce.”
Picking up a handful of earth, he hurled it at their faces while saying:
“May your faces be shameful.”
Their eyes were thick with dust and the enemy began to retreat in utter confusion.