Allah's Messenger (ﷺ) said:

بِسْمِ اللَّـهِ الرَّحْمَـٰنِ الرَّحِيمِ اَلْحَمْدُ لِلَّـهِ الَّذِي أَنزَلَ عَلَىٰ عَبْدِهِ الْكِتَابَ وَلَمْ يَجْعَل لَّهُ عِوَجًا ۜ ﴿١﴾ قَيِّمًا لِّيُنذِرَ بَأْسًا شَدِيدًا مِّن لَّدُنْهُ وَيُبَشِّرَ الْمُؤْمِنِينَ الَّذِينَ يَعْمَلُونَ الصَّالِحَاتِ أَنَّ لَهُمْ أَجْرًا حَسَنًا ﴿٢﴾ مَّاكِثِينَ فِيهِ أَبَدًا ﴿٣﴾ وَيُنذِرَ الَّذِينَ قَالُوا اتَّخَذَ اللَّـهُ وَلَدًا ﴿٤﴾ مَّا لَهُم بِهِ مِنْ عِلْمٍ وَلَا لِآبَائِهِمْ ۚ كَبُرَتْ كَلِمَةً تَخْرُجُ مِنْ أَفْوَاهِهِمْ ۚ إِن يَقُولُونَ إِلَّا كَذِبًا ﴿٥﴾ فَلَعَلَّكَ بَاخِعٌ نَّفْسَكَ عَلَىٰ آثَارِهِمْ إِن لَّمْ يُؤْمِنُوا بِهَـٰذَا الْحَدِيثِ أَسَفًا ﴿٦﴾ إِنَّا جَعَلْنَا مَا عَلَى الْأَرْضِ زِينَةً لَّهَا لِنَبْلُوَهُمْ أَيُّهُمْ أَحْسَنُ عَمَلًا ﴿٧﴾ وَإِنَّا لَجَاعِلُونَ مَا عَلَيْهَا صَعِيدًا جُرُزًا ﴿٨﴾ أَمْ حَسِبْتَ أَنَّ أَصْحَابَ الْكَهْفِ وَالرَّقِيمِ كَانُوا مِنْ آيَاتِنَا عَجَبًا ﴿٩﴾ إِذْ أَوَى الْفِتْيَةُ إِلَى الْكَهْفِ فَقَالُوا رَبَّنَا آتِنَا مِن لَّدُنكَ رَحْمَةً وَهَيِّئْ لَنَا مِنْ أَمْرِنَا رَشَدًا ﴿١٠﴾

Bismillaahir-Rahmaanir-Raheem. Alhamdu lillaahillazeee anzala 'alaa 'abdikhil-kitaaba wa lam yaj'al-lahoo 'iwajaa. Qayyimal-liyunzira ba'san shadeedam-mil-ladunhu wa yubashshiral-mu'mineenal-lazeena ya'maloonas-saalihaati anna lahum ajran hasanaa. Maakitheena feehi abadaa. Wa yunziral-lazeena qaalut-takhazallaahu waladaa. Maa lahum bihee min 'ilmin wa laa li-aabaaa'ihim; kaburat kalimatan takhruju min afwaahihim; in yaqooloona illaa kazibaa. Fala'allaka baakhi'un-nafsaka 'alaa aathaarihim in lam yu'minoo bihaazal-hadeethi asafaa. Innaa ja'alnaa maa 'alal-ardi zeenatal-lahaa linabluwahum ayyuhum ahsanu 'amalaa. Wa innaa lajaa'iloona maa 'alayhaa sa'eedan juruzaa. Am hasibta anna Ashaabal-Kahfi war-Raqeemi kaanoo min aayaatinaa 'ajabaa. Iz awal-fityatu ilal-Kahfi faqaaloo Rabbanaa aatinaa mil-ladunka rahmatan wa hayyi' lanaa min amrinaa rashadaa.

(1) [All] praise is [due] to Allah, who has sent down upon His Servant the Book and has not made therein any deviance. (2) [He has made it] straight, to warn of severe punishment from Him and to give good tidings to the believers who do righteous deeds that they will have a good reward (3) In which they will remain forever (4) And to warn those who say, " Allah has taken a son." (5) They have no knowledge of it, nor had their fathers. Grave is the word that comes out of their mouths; they speak not except a lie. (6) Then perhaps you would kill yourself through grief over them, [O Muhammad], if they do not believe in this message, [and] out of sorrow. (7) Indeed, We have made that which is on the earth adornment for it that We may test them [as to] which of them is best in deed. (8) And indeed, We will make that which is upon it [into] a barren ground. (9) Or have you thought that the companions of the cave and the inscription were, among Our signs, a wonder? (10) [Mention] when the youths retreated to the cave and said, "Our Lord, grant us from Yourself mercy and prepare for us from our affair right guidance. (Sura Kahf: 1-10) The Prophet (ﷺ) said, "If anyone learns by heart the first ten verses of the Surah al-Kahf, he will be protected from the Dajjal."

Reference: Muslim: 809