Du'a for protection against enemies

اللَّهُمَّ مُنْزِلَ الْكِتَابِ، سَرِيعَ الْحِسَابِ، اهْزِمِ الْأَحْزَابَ، اللَّهُمَّ اهْزِمْهُمْ وَزَلْزِلْهُمْ

Allahumma munzilal-kitabi, sari'al-hisabi, ihzimil-ahzaba, Allahumma ihzimhum wa zalzilhum

O Allah, Revealer of the Book, Swift to account, defeat the groups (of disbelievers). O Allah, defeat them and shake them.

Ṣaḥīḥ al-Bukhārī 2933, Ṣaḥīḥ Muslim 1742