Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him)
Some sisters fear being harassed if they wear the hijab in public in the current climate. What can they recite for protection?
They should recite the following whenever they leave the house:
- The Prophetic prayer:
بِاسمِ اللهِ آمَنْتُ بِاللهِ تَوَكَّلْتُ عَلَى اللهِ ولا حَوْلَ ولا قُوَّةَ إِلا بِاللهِ العَلِيِّ العَظِيم
Bismillah, amantu billah, tawakkaltu al’Allah, wa la hawla wa la quwwata illa billahi’l-`aliyyi’l-`azim
In the name of Allah, I place my trust and reliance in Allah. There is no strength or power save by Allah
- Ayat al-Kursi
- Wird al-Sakran (if they know it) 
They must strive to show good character, be dignified and set the best example to those around them. They should not be affected by those who say unpleasant things to them and they should show kindness to those who mistreat them. This is a trial and its evil will soon pass.
 Wird al-Sakran can be found in al-Khulasah, after Surah Ya Sin. It is a short and powerful wird read for protection from all types of evil. It was composed by Shaykh Abu Bakr al-Sakran the son of Shaykh Abd al-Rahman al-Saqqaf.