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:2:238 –

Maintain with care the ˹obligatory˺ prayers and ˹in particular˺ the middle prayer and stand before Allah, devoutly obedient.  

Maintain the, five, prayers, by performing them at their appointed times, and the middle prayer, either that of the afternoon, or the morning, or the midday, or another prayer (there are many opinions on this matter); God has singled it out for mention because of its merit; and stand, in prayer, submissive to God, li Lllāhi qānitīn: some have said that this means ‘obedience’, on account of the Prophet (s) saying, ‘Wherever the ˹expression˺ qunūt ˹‘submission’˺, appears in the Qur’ān, it denotes obedience’, as reported by Ahmad ˹b. Hanbal˺ and others; it is also said to mean ‘in silence’ ˹sākitīn˺, on the basis of a hadīth of Zayd b. Arqam, in which he said, ‘We used to speak to each other sometimes during prayer, but when this was revealed, we were commanded to be silent and were forbidden to talk’, as reported by the two Shaykhs ˹Bukhārī and Muslim˺.
القرآن:٢:٢٣٨ –

حَافِظُوا عَلَى الصَّلَوَاتِ وَالصَّلَاةِ الْوُسْطَىٰ وَقُومُوا لِلَّهِ قَانِتِينَ  

{حافظوا على الصلوات} الخمس بأدائها في أوقاتها {والصلاة الوسطى} هي العصر أو الصبح أو الظهر أو غيرها أقوال وأفردها بالذكر لفضلها {وقوموا لله} في الصلاة {قانتين} قيل مطيعين لقوله ﷺ : كل قنوت في القرآن فهو طاعة، رواه أحمد وغيره، وقيل ساكتين لحديث زيد بن أرقم: كنا نتكلم في الصلاة حتى نزلت فأمرنا بالسكوت ونُهينا عن الكلام رواه الشيخان.

See similar narrations below:

Collected by Suyūṭī