حِصْنُ الْمُسْلِمِ
Hisn al-Muslim 245
Fortress of the Muslim (Hisn al-Muslim)
When startled
لا إلهَ إلاّ اللّهُ
Lā ilāha illallāh! There is none worthy of worship but Allah! Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 6/181, Muslim 4/2208.
Hisn al-Muslim, 245