Al-Ahzab - 33:14

وَلَوْ دُخِلَتْ عَلَيْهِم مِّنْ أَقْطَارِهَا ثُمَّ سُئِلُوا الْفِتْنَةَ لَآتَوْهَا وَمَا تَلَبَّثُوا بِهَا إِلَّا يَسِيرًا
[33:14]
And if an entry were made upon them from the outlying parts of it, then they were asked to wage war, they would certainly have done it, and they would not have stayed in it but a little while.
And if an entry had been effected to them from the sides of the (city), and they had been incited to sedition, they would certainly have brought it to pass, with none but a brief delay!
If the enemy had entered from all sides and they had been exhorted to treachery, they would have committed it, and would have hesitated thereupon but little.