Medina, like a stronghold, was resisting against the Syrian army and breaking through the Medinan troops seemed not very easy.1109
Having become worried, Muslim b. 'Uqba turned to Marwān and said: “You claimed earlier in Wādī al-Qurā that you have devised a plan for penetrating into Medina that you will carry out in its due time; is it not the right time to carry it out?!
Marwān b. Hakam set out toward Medina until he arrived near Banī Hāritha tribe. He summoned one of the tribe's men whom he had already identified and in a secret conversation promised to heavily reward him and do good to him for showing a way to penetrate into Medina. The man was taken in.2 He showed Marwān a way to Medina from the neighborhood of Banī 'Abd al-Ashhal and the Syrian troops penetrated into Medina from that same way. 3
A considerable number of troops managed to reach behind the front lines of the Medinan combatants, clashed with them, and killed a great number of them.4
It so happened that the front line combatants and defenders heard the takbīr and wailing from inside Medina5 and after a very short while noticed the onslaught of the Syrian army prompting them to leave the battle and rush back to Medina to defend their women and children!6
The news of the Syrians invasion of Medina quickly spread all over the Medina's resistant front and overwhelmingly alarmed the people of Medina. A group of them returned to Medina and another group clashed with the Syrians, while a third group were rolled down into the trench in their hit-and-run fighting and skirmishes that resulted in the number of the people killed in the trench outnumbering those who were killed in the battle field.7
From this stage on, the Medinan defending forces dispersed and gradually weakened, not showing much resistance in the battle field.
Muslim b. 'Uqba pointed to the standard-bearer of the Medinan forces Fadl b. 'Abbās and instigated his soldeirs to carry out a targetted and harmonized attack on him. A heavy fighting broke out in which Fadl b. 'Abbās was killed, while being at a distance of ten cubits about five meters away from Muslim b. 'Uqba.8
In this attack, Zayd b. 'Abd al-Rahmān b. 'Awf also lost his life along with Fadl b. 'Abbās.9