They will not fight you (even) together, except in fortified townships, or from behind walls. Strong is their fighting (spirit) amongst themselves: thou wouldst think they were united, but their hearts are divided: that is because they are a people devoid of wisdom.
. ‘It may be that they have a strong fighting spirit
among themselves, but they have no Cause to fight for
and no common objective to achieve.
The Makkan Pagans want to keep their own unjust
autocracy; the Madinah Hypocrites wish for their own
domination in Madinah; and the Jews want their racial
superiority established over the Arabs, of whose growing
union and power they are jealous.’
Their pretended alliance could not stand the strain of
either a defeat or a victory. If they had been wise, they
would have accepted the Cause of Unity, Faith, and
Yusuf Ali, Abdullah. Translation and Commentary of the Quran. (surah 59 verse 14 Quran Arabic with English Translation & Commentary (Tafsir) by Abdullah Yusuf Ali, Free Download (quran4u.com)