As soon as it was day, Saad had all the dead bodies of the Muslims evacuated from the battle-field, and carried on camels to Uzeib where these were buried in a small valley.
The Persians had suffered heavy casualties the previous day. All their elephants were wounded, and on the second day there were no elephants in the Persian fighting force.
The battle began with the usual duels. Jalinus the Persian General threw a challenge for single combat which was accepted by Taleaha from the Muslim side. The two champions grappled with one another. After some time Taleaha struck his sword on the head of the Persian General. The sword hardly cut the helmet of the Persian's General but did him no physical harm. Unnerved Jalinus beat a hasty retreat.
There was a duel between Ilba b Jahash and a Persian Officer. The Persian was killed. Ilba also received some fatal wounds, and his intestines came out of his belly. He put the intestines into his belly and began to crawl to the Persian front. With his last breath he said:
"I look for merit with our Lord
I was of those who fought the best."
Thereafter he fell dead just in front of the Persian front.
There was another duel between A'war b. Qutba and the Persian noble Shahryar. In this duel both the Muslim and his Persian adversary were killed.
At noon a small cloud of dust rose in the horizon on the way leading to Syria. Out of the cloud emerged a contingent led by Qaqa b. Amr. Umar had written to Abu Ubaida the Commander of the Muslim forces in Syria that whatever forces he could spare from the Syrian front should be sent to Iraq. After the fall of Yermuk Abu Ubaida sent a force of 1,000 men to Iraq under the Command of Hashim b. Utba who was a nephew of Saad b Abi Waqas. When Hashim neared Qadisiyya he sent an advance guard under Qaqa. As Qaqa arrived at the battle-field he gave the cry of 'Allah-o-Akbar', and this cry was taken up by the other Muslims who were thrilled at his arrival. Qaqa was a brother of Asim b. Amr.
Qaqa rushed into the baltle-field and gave the challenge for a duel. The challenge was accepted by the Persian General Rahman the man who had commanded the Persians at the battle of the Bridge. In a few rounds Qaqa killed Bahman. Qaqa threw another challenge. This was accepted by the Persian General Beerzan.
In the duel that followed Beerzan was killed by Qaqa. Thereafter Qaqa returned to the Muslim lines. Addressing his men he said:
"O Muslims greet the enemy with the sword. Only with sword do men kill. Do as I do."
Then Saad ordered a general attack. The Muslim forces swept forward, but the Persians stood firm and repulsed every attack. Ultimately the Muslims pulled back to their original position. Qaqa now resorted to an ingenious device. The camels were camouflaged to look like weird monsters. These monsters moved to the Persian front and seeing them the Persian horses turned and bolted. With the disorganisation of the Persian cavalry, the Persians became vulnerable. Saad ordered the Muslims to intensify the attack. Some of the Persian units reeled under the Muslim attack and fell back to the river bank. Through the gaps in the Persian army, the Muslims penetrated deep towards the rear of the Persian army. Qaqa led a group of men through the Persian centre towards Rustam's headquarters Rustam drew his sword and personally led a counter attack against the Muslims.
Fighting was hard and fierce. It continued till night had set in. Then the two armies pulled back to their camps. The battle of Qadisiyya was not over, but the Muslims had certainly established their supremacy over the Persian forces.