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

Council to contemplate individually and avoiding groupthink

quran:34:46 –

Say, "I only advise you of one ˹thing˺ - that you stand for Allah, ˹seeking truth˺ in pairs and individually, and then give thought." There is not in your companion any madness. He is only a warner to you before a severe punishment.  

Say: ‘I will give you just one ˹piece of˺ admonition: namely, that you rise up for God, in other words, for His sake, in twos and individually, and then reflect: and realise ˹that˺, there is no madness in your companion, Muhammad (s). He is just a warner to you before ˹the befalling of˺ a severe chastisement’, in the Hereafter, if you disobey him.
القرآن:٣٤:٤٦ –

قُلْ إِنَّمَا أَعِظُكُمْ بِوَاحِدَةٍ ۖ أَنْ تَقُومُوا لِلَّهِ مَثْنَىٰ وَفُرَادَىٰ ثُمَّ تَتَفَكَّرُوا ۚ مَا بِصَاحِبِكُمْ مِنْ جِنَّةٍ ۚ إِنْ هُوَ إِلَّا نَذِيرٌ لَكُمْ بَيْنَ يَدَيْ عَذَابٍ شَدِيدٍ  

{قل إنما أعظكم بواحدة} هي {أن تقوموا لله} أي لأجله {مثنى} أي اثنين اثنين {وفرادى} واحدا واحدا {ثم تتفكروا} فتعلموا {ما بصاحبكم} محمد {من جنة} جنون {إن} ما {هو إلا نذير لكم بين يدي} أي قبل {عذاب شديد} في الآخرة إن عصيتموه.