Seven Letters Do Not Occur in Surah Al-Fatiha

They are the tha’ of al-thubur (destruction),

the jim of al-jahim (Hellfire),

the kha’ of al-khawf (fear),

the zay of al-zaqqum (the tree of bitter fruit in Hell),

the sheen of al-Shaqawa (misfortune) ,

the za’ of al-Zulma (darkness)
&
the fa’ of al-firaq (separation)

If someone firmly believes in (the merit of) this Qur’an chapter and recites it in a state of reverence and veneration, he/she will be safe from these seven things.

~ Shaykh al-Islam Ibrahim Niasse (d.1975) in his Magnum Opus, Kashif al-Ilbas pg. 183.