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
bayhaqi:8870 – Abū al-Ḥasan ʿAlī b. Muḥammad al-Muqriʾ > al-Ḥasan b. Muḥammad b. Isḥāq > Yūsuf b. Yaʿqūb > ʿAmr b. Marzūq > Hammām > Qatādah > Muṭarrif > ʿImrān b. Ḥuṣayn

[Machine] We enjoyed being with the Messenger of Allah ﷺ during the revelation of the Quran, so a man should say his opinion freely according to what he wishes.  

البيهقي:٨٨٧٠ – أَخْبَرَنَا أَبُو الْحَسَنِ عَلِيُّ بْنُ مُحَمَّدٍ الْمُقْرِئُ أنبأ الْحَسَنُ بْنُ مُحَمَّدِ بْنِ إِسْحَاقَ ثنا يُوسُفُ بْنُ يَعْقُوبَ ثنا عَمْرُو بْنُ مَرْزُوقٍ أنبأ هَمَّامٌ عَنْ قَتَادَةَ عَنْ مُطَرِّفٍ عَنْ عِمْرَانَ بْنِ حُصَيْنٍ قَالَ

تَمَتَّعْنَا مَعَ رَسُولِ اللهِ ﷺ وَنَزَلَ فِيهِ الْقُرْآنُ فَلْيَقُلْ رَجُلٌ بِرَأْيِهِ مَا شَاءَ  

أَخْرَجَهُ الْبُخَارِيُّ وَمُسْلِمٌ فِي الصَّحِيحِ مِنْ حَدِيثِ هَمَّامِ بْنِ يَحْيَى

See similar narrations below:

Collected by Ṭabarānī
tabarani:15384 – Abū Muslim al-Kashhī And ʾAḥmad b. Ismāʿīl al-ʿAdawī al-Baṣrī > ʿAmr b. Marzūq > Hammām > Qatādah > Muṭarrif > ʿImrān b. Ḥuṣayn

[Machine] We enjoyed (or benefited) with the Messenger of Allah ﷺ , and the Quran was revealed to him. So, let a man express his opinion freely as he wishes.  

الطبراني:١٥٣٨٤ – حَدَّثَنَا أَبُو مُسْلِمٍ الْكَشِّيُّ وَأَحْمَدُ بْنُ إِسْمَاعِيلَ الْعَدَوِيُّ الْبَصْرِيُّ قَالَا ثنا عَمْرُو بْنُ مَرْزُوقٍ أنا هَمَّامٌ عَنْ قَتَادَةَ عَنْ مُطَرِّفٍ عَنْ عِمْرَانَ بْنِ حُصَيْنٍ قَالَ

«تَمَتَّعْنَا مَعَ رَسُولِ اللهِ ﷺ وَنَزَلَ بِهِ الْقُرْآنُ فَلْيَقُلْ رَجُلٌ بِرَأْيِهِ مَا شَاءَ»