Dua for protection from oppressors:
رَبَّنَا أَخْرِجْنَا مِنْ هَٰذِهِ الْقَرْيَةِ الظَّالِمِ أَهْلُهَا وَاجْعَلْ لَنَا مِنْ لَدُنْكَ وَلِيًّا وَاجْعَلْ لَنَا مِنْ لَدُنْكَ نَصِيرًا
Our Lord! Rescue us from this town whose people are oppressors; and raise for us from You one who will protect, and raise for us from You one who will help.
[Surah An-Nisa]