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:17:110 –

Say, "Call upon Allah or call upon the Most Merciful. Whichever ˹name˺ you call - to Him belong the best names." And do not recite ˹too˺ loudly in your prayer or ˹too˺ quietly but seek between that an ˹intermediate˺ way.  

The Prophet (s) would often say, ‘O God, O Compassionate One’. So they said, ‘He ˹Muhammad, s˺ forbids us to worship more than one god, and yet he calls upon another ˹god˺ together with Him ˹God˺’. The following was then revealed: Say, to them: ‘Invoke God or invoke the Compassionate One, that is to say, invoke Him by either of these ˹Names˺ or call upon Him by saying, ‘O God! O Compassionate One!’, whichever (ayyan is conditional; mā is extra), in other words, whichever of these two ˹Names˺, you invoke, is beautiful — this ˹predicate, ‘beautiful’˺ is indicated by the following ˹statement˺), to Him, to the One called by these two ˹Names˺, belong the Most Beautiful Names’, these two ˹Names˺ being from among them; and they ˹the other Names˺ are ˹the following˺ as ˹mentioned˺ in hadīth: God, there is no god except Him, the Compassionate, the Merciful, the King, the Holy, the Peace, the Securer, the Controller, the Mighty, the Compeller, the Sublime, the Creator, the Maker ˹out of nothing˺, the Fashioner, the ˹ever˺ Forgiving, the Almighty, the Bestower, the Provider, the Deliverer, the Knower, the Seizer, the Extender, the Lowerer, the Raiser, the Glorifier, the Abaser, the Hearer, the Seer, the Arbiter, the Just, the Subtle, the Aware, the Forbearing, the Tremendous, the Forgiver, the Thankful, the High, the Great, the Preserver, the Conserver, the Reckoner, the Majestic, the Generous, the Watcher, the Responsive, the Embracing, the Wise, the Loving, the Glorious, the Resurrector, the Witnessing, the Truth, the Guardian, the Strong, the Firm, the Patron, the Praiseworthy, the Numberer, the Initiator, the Restorer, the Life-giver, the Death-maker, the Living, the Eternal Sustainer, the Originator, the Magnificent, the One, the Single, the Everlasting Refuge, the Powerful, the Omnipotent, the Advancer, the Deferrer, the First, the Last, the Outward, the Inward, the Ruler, Exalted, the Benign, the Relenting, the Avenger, the Pardoning, the Gentle, Master of the Kingdom, One of Majesty and Munificence, the Equitable, the Gatherer, the Independent, the Availing, the Restrainer, the Harming, the Benefactor, the Light, the Guiding, the Innovator, the Enduring, the Inheritor, the Reasonable, the Patient, as reported by al-Tirmidhī. God, exalted be He, says: And do not be loud in your prayer, when you recite ˹the Qur’ān˺ therein, lest the idolaters hear you and curse you, as well as the Qur’ān and the One Who has revealed it; nor be silent, do ˹not˺ murmur, therein, so that your companions might ˹be able to hear it and˺ benefit ˹therefrom˺; but seek between that, loudness and silence, a, middle, way.
القرآن:١٧:١١٠ –

قُلِ ادْعُوا اللَّهَ أَوِ ادْعُوا الرَّحْمَٰنَ ۖ أَيًّا مَا تَدْعُوا فَلَهُ الْأَسْمَاءُ الْحُسْنَىٰ ۚ وَلَا تَجْهَرْ بِصَلَاتِكَ وَلَا تُخَافِتْ بِهَا وَابْتَغِ بَيْنَ ذَٰلِكَ سَبِيلًا  

وكان ﷺ يقول "" يا الله يا رحمن "" فقالوا: ينهانا أن نعبد إلهين وهو يدعو إلها آخر معه فنزل (قل) لهم (ادعوا الله أو ادعوا الرحمن) أي سموه بأيهما أو نادوه بأن تقولوا: يا الله يا رحمن (أيا) شرطية (ما) زائدة أي هذين (تدعوا) فهو حسن دل على هذا (فله) أي لمسماهما (الأسماء الحسنى) وهذان منها فإنها كما في الحديث "" الله لا إله إلا هو الرحمن الرحيم الملك القدوس السلام المؤمن المهيمن العزيز الجبار المتكبر الخالق البارئ المصور الغفار القهار الوهاب الرزاق الفتاح العليم القابض الباسط الخافض الرافع المعز المذل السميع البصير الحكم العدل اللطيف الخبير الحليم العظيم الغفور الشكور العلي الكبير الحفيظ المقيت الحسيب الجليل الكريم الرقيب المجيب الواسع الحكيم الودود المجيد الباعث الشهيد الحق الوكيل القوي المتين الولي الحميد المحصي المبدئ المعيد المحيي المميت الحي القيوم الواجد الماجد الواحد الأحد الصمد القادر المقتدر المقدم المؤخر الأول الآخر الظاهر الباطن الوالي المتعالي البر التواب المنتقم العفو الرءوف مالك الملك ذو الجلال والإكرام المقسط الجامع الغني المغني المانع الضار النافع النور الهادي البديع الباقي الوارث الرشيد الصبور" رواه الترمذي {ولا تجهر بصلاتك} بقراءتك بها فيسمعك المشركون فيسبوك ويسبوا القرآن ومن أنزله {ولا تخافت} تسر {بها} لينتفع أصحابك {وابتغ} اقصد {بين ذلك} الجهر والمخافتة {سبيلا} طريقا وسطا.