Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:39:23

Allah has sent down the best statement: a consistent Book wherein is reiteration. The skins shiver therefrom of those who fear their Lord; then their skins and their hearts relax at the remembrance of Allah. That is the guidance of Allah by which He guides whom He wills. And one whom Allah leaves astray - for him there is no guide.  

God has revealed the best of discourses, a Book (kitāban, substitutes for ahsana, ‘the best’) namely, a Qur’ān, consimilar, in other words, some of its parts are similar to others in terms of ˹their˺ arrangement and otherwise, in coupled phrases — ˹a Book˺ in which the Promise ˹of reward˺ is coupled with the Threat ˹of punishment˺, together with other such ˹couplings˺ — whereat quiver, at the mention of whose Threat shiver, the skins of those who fear their Lord; then their skins and their hearts soften to, they are reassured by, the remembrance of God, that is, at the mention of His Promise. That, Book, is God’s guidance, by which He guides whomever He will, of His servants; and whomever God leads astray, for him there is no guide.
القرآن:٣٩:٢٣

اللَّهُ نَزَّلَ أَحْسَنَ الْحَدِيثِ كِتَابًا مُتَشَابِهًا مَثَانِيَ تَقْشَعِرُّ مِنْهُ جُلُودُ الَّذِينَ يَخْشَوْنَ رَبَّهُمْ ثُمَّ تَلِينُ جُلُودُهُمْ وَقُلُوبُهُمْ إِلَىٰ ذِكْرِ اللَّهِ ۚ ذَٰلِكَ هُدَى اللَّهِ يَهْدِي بِهِ مَنْ يَشَاءُ ۚ وَمَنْ يُضْلِلِ اللَّهُ فَمَا لَهُ مِنْ هَادٍ  

{الله نزَّل أحسن الحديث كتابا} بدل من أحسن، أي قرآنا {متشابها} أي يشبه بعضه بعضا في النظم وغيره {مثانَي} ثني فيه الوعد والوعيد وغيرهما {تقشعر منه} ترتعد عند ذكره وعيده {جلود الذين يخشوْن} {يخافون ربهم ثم تلين} تطمئن {جلودهم وقلوبهم إلى ذكر الله} أي عند ذكر وعده {ذلك} أي الكتاب {هدى الله يهدي به من يشاء ومن يضلل الله فما له من هاد}.