An-Nisa' - 4:45

وَاللّهُ أَعْلَمُ بِأَعْدَائِكُمْ وَكَفَى بِاللّهِ وَلِيًّا وَكَفَى بِاللّهِ نَصِيرًا
[4:45]
And Allah best knows your enemies; and Allah suffices as a Guardian, and Allah suffices as a Helper.
But Allah hath full knowledge of your enemies: Allah is enough for a protector, and Allah is enough for a Helper.
Allah knoweth best (who are) your enemies. Allah is sufficient as a Guardian, and Allah is sufficient as a Supporter.