Membaca surat al kahfi: sakinah (ketenangan) yang turun saat Al Qur`an dibaca atau as sakinah itu memang turun untuk Al Qur`an
Imam Bukhari : 4462حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى عَنْ إِسْرَائِيلَ عَنْ أَبِي إِسْحَاقَ عَنْ الْبَرَاءِ رَضِيَ اللَّهُ عَنْهُ قَالَبَيْنَمَا رَجُلٌ مِنْ أَصْحَابِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقْرَأُ وَفَرَسٌ لَهُ مَرْبُوطٌ فِي الدَّارِ فَجَعَلَ يَنْفِرُ فَخَرَجَ الرَّجُلُ فَنَظَرَ فَلَمْ يَرَ شَيْئًا وَجَعَلَ يَنْفِرُ فَلَمَّا أَصْبَحَ ذَكَرَ ذَلِكَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ السَّكِينَةُ تَنَزَّلَتْ بِالْقُرْآنِ
Narrated to us [Ubaidullah bin Musa] from [Israil] from [Abu Ishaq] from [Al Baraa, may Allah be pleased with him] he said While a man from the companions of the Prophet, peace and blessings be upon him, was reciting, his horse, tied in the courtyard, became restless. The man went out and looked but saw nothing, yet the horse remained restless. In the morning, he mentioned this to the Prophet, peace and blessings be upon him, who said: "Tranquility descended with the Quran.