IN-19
Invocation against an enemy
Allaahumma munzilal-kitaabi, saree'al-hisaabi, ihzimil-'ahzaaba, Allaahumma ihzimhum wa zalzilhum.
Allah, Revealer of the Book, Swift to account , defeat the groups (of disbelievers) . O Allah , defeat them and shake them.
Reference: Muslim 3/1362
What to say if you fear people may harm you
Allaahummak-fineehim bimaa shi'ta.
O Allah, suffice (i.e. protect) me against them however You wish.
Reference: Muslim 4/2300