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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:18:1 – In the name of Allah, the Entirely Merciful, the Especially Merciful.

˹All˺ praise is ˹due˺ to Allah, who has sent down upon His Servant the Book and has not made therein any deviance.  

Praise — which is the attribution ˹to a person˺ of that which is beautiful — is established ˹as something that˺, belongs to God ˹alone˺, exalted be He. Now, is the intention here to point this out for the purpose of believing in it, or to praise ˹God˺ thereby, or both? All are possibilities, the most profitable of which is ˹to understand˺ the third ˹as being the intention behind this statement˺; Who has revealed to His servant, Muhammad (s), the Book, the Qur’ān, and has not allowed for it, that is, ˹He has not allowed that there be˺ in it, any crookedness, ˹any˺ variance or contradiction (the ˹last˺ sentence ˹wa-lam yaj‘al lahu ‘iwajan˺ is a circumstantial qualifier referring to al-kitāb, ‘the Book’);
القرآن:١٨:١ – بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ

الْحَمْدُ لِلَّهِ الَّذِي أَنْزَلَ عَلَىٰ عَبْدِهِ الْكِتَابَ وَلَمْ يَجْعَلْ لَهُ عِوَجًا ۜ  

{الحمد} وهو الوصف بالجميل، ثابت {لله} تعالى وهل المراد الإعلام بذلك للإيمان به أو الثناء به أو هما؟ احتمالات، أفيدها الثالث {الذي أنزل على عبده} محمد {الكتاب} القرآن {ولم يجعل له} أي فيه {عوجا} اختلافا أو تناقضا، والجملة حال من الكتاب.