Аль Имран 3:123

These verses were revealed after the Battle of Uhud which took place in the third year after hijrah. The enemy forces numbered three thousand, while the Muslims who rose in defence were initially only one thousand in number. When three hundred hypocritical Muslims, led by ‘Abdullah ibn Ubayy, deserted, some of the Madinan Muslims were disheartened at this, so the Prophet reminded them that they had come forth to defend themselves, relying on God rather than only on themselves. If, due to the severity of circumstances, believers show some temporary weakness, God does not leave them to fend for themselves. He sends His special succour to restore their faith. This special succour of God was sent to the whole group of believers at a time when, by exploiting the weakness of the Muslims, the enemies had overcome them, and had every opportunity to crush the Muslim forces completely. But the enemy army, in spite of being victorious, retreated from the battlefield. This astonishing event in military history took place because of the special divine succour, which diverted the enemy towards ‘Makkah’ rather than ‘Madinah’ (the Muslim area). It was the defeated who pursued the victorious.