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:20:8 –

Allah - there is no deity except Him. To Him belong the best names.  

God — there is no god save Him. To Him belong the Most Beautiful Names, the ninety nine ˹Names˺, cited in the hadīth (al-husnā is the feminine form of al-ahsan, ‘the best’).
القرآن:٢٠:٨ –

اللَّهُ لَا إِلَٰهَ إِلَّا هُوَ ۖ لَهُ الْأَسْمَاءُ الْحُسْنَىٰ  

{الله لا إله إلى هو له الأسماء الحسنى} التسعة والتسعون الوارد بها الحديث والحسنى مؤنث الأحسن.

See similar narrations below:

Collected by Qurʾān
quran:3:2 –

Allah - there is no deity except Him, the Ever-Living, the Sustainer of existence.  

God! There is no god except Him, the Living, the Eternal.
القرآن:٣:٢ –

اللَّهُ لَا إِلَٰهَ إِلَّا هُوَ الْحَيُّ الْقَيُّومُ  

{الله لا إله إلا هو الحي القيوم}.