Surah Al-Kafiroun
Surah Al-Kafiroun (The Unbeliever)
” Bismillahir-Rahmanir-Raheem
            Qul ya ayyuhal-Kafiroun
            La ‘a-budu ma ta’-bu-doun
            Wa la antum ‘abidouna ma ‘a-bud
            Wa la ana ‘abidum-ma ‘abadttum
            Wa la antum ‘abiduna ma ‘a-bud
        Lakum deenukum wa li-ya deen “
“ Say : O Al-Kafiroun ( disbelievers in Allah , in His Oneness , in His Angels , in His Books , in His Messengers , in the Day of Resurrection , and in Al-Qadar , etc )! I worship not that whch you worship, Nor will you worship that which I worship. And I shall not worship that which you are worshipping. Nor will you worship that which I worship. To you be your religion, and to me my religion (Islamic Monotheism). “
Surah Al-Ikhlas
Surah Al-Ikhlas (The Purity)
” Bismillahir-Rahmanir-Raheem
            Qul Huwa-llahu ‘Ahad
            Allahus-Samad
            Lam Yalid Wa Lam Yulad
        Walam Yakul-La-Hu-Kufuwan ‘Ahad “
“ Say : He is Allah,(the) One, Allahus-Samad ( The Self-Sufficient Master, Whom all creatures need, He neither eats nor drinks ). He begots not , nor was He begotten; And there is none co-equal or comparable unto Him.”
Surah Al-Falaq
Surah Al-Falaq (Dawn)
” Bismillahir-Rahmanir-Raheem
            Qul ‘A’udhu Bi-Rabbil-Falaq
            Min Sharri Ma Khalaq
            Wa Min Sharri Ghasiqin ‘Idha Waqab
            Wa Min Sharri-Naffathati Fil-‘Uqadi
        Wa Min Sharri Hasidin ‘Idha Hasad “
” Say : I seek refuge with ( Allah ) the Lord of the daybreak, From the evil of what He has created; And from the evil of the darkening ( night ) as it comes with its darkness; ( or the moon as it sets or goes away ). And from the evil of the witchcrafts when they blow in the knots, And from the evil of the envier when he envies. “
Surah An-Nas
Surah An-Nas (Mankind)

” Bismillahir-Rahmanir-Raheem
            Qul ‘A’udhu Bi-Rabbin-Nas
            Malikin-Nas
            Ilahin-Nas
            Min-Sharril-Waswasil-Khan-Nas
            Al-Ladhi Yuwas-wisu Fee Sudurin-Nas
        Mina Al-Jinnati Wan-Nas “
“ Say : I seek refuge with (Allah ) the lord of mankind, The king of mankind, The Ilah ( God ) of mankind, From the evil of the whisperer ( devi l who whispers evil in the hearts of men) , who withdraws ( from his whispering in one’s heart after one remembers Allah ), Who whispers in the breasts of mankind , Of jinns and men.”
The 4 Quls
The 4 Quls are known as protecting Surahs. Surah Al-Kafiroun and Al-Ikhlas protect from shirk. Surahs Al-Falaq and An-Naas protect from mischief of created things, envy, magic and the whisperings of the shaitaan.
According to the Hadith, Surah Al-Ikhlas reward is equivalent to one third of the Quran while Surah Al-Kafiroun is one quarter.
All the Surahs start with the word 'Qul' which in Arabic means 'say'. Hence the four Surahs are collectively called as 'the four quls'. Prophet Muhammad(S.A.W) would get revelations from Allah(S.W.T) which would start with the word 'say' and he would repeat exactly, the revelations to people.
The 4 Quls start as:
          Al-Kafiroun:
          [109.1] Say: O unbelievers
          Al-Ikhlas:
          [112.1] Say: He is Allah, the One
           Al-Falaq:
          [113.1] Say: I seek refuge with (Allah) the Lord of Daybreak
          An-Naas: 
          [114.1] Say: I seek refuge with (Allah)