Membaca surat al kahfi: sakinah (ketenangan) yang turun saat Al Qur`an dibaca atau as sakinah itu memang turun untuk Al Qur`an
Imam Ahmad : 17744حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ أَبِي إِسْحَاقَ قَالَ سَمِعْتُ الْبَرَاءَ يَقُولُ قَرَأَ رَجُلٌ الْكَهْفَ وَفِي الدَّارِ دَابَّةٌ فَجَعَلَتْ تَنْفِرُ فَنَظَرَ فَإِذَا ضَبَابَةٌ أَوْ سَحَابَةٌ قَدْ غَشِيَتْهُ قَالَا فَذَكَرَ ذَلِكَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ اقْرَأْ فُلَانُ فَإِنَّهَا السَّكِينَةُ تَنَزَّلَتْ عِنْدَ الْقُرْآنِ أَوْ تَنَزَّلَتْ لِلْقُرْآنِ
Narrated to us [Muhammad bin Ja'far] Narrated to us [Syu'bah] from [Abu Ishaq] he said, I heard [Al Baraa`] say: A man was reading Surah Al-Kahfi, while in his house there was a crawling animal that immediately fled. Then he saw that a thin cloud had shaded him. Then they both mentioned that to the Prophet Peace be upon him. He said: "Read, O so-and-so! That is As Sakinah (tranquility) which descends when the Qur'an is read, or that As Sakinah indeed descends for the Qur'an.