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
abudawud:4666 – Ismāʿīl b. Ibrāhīm al-Hudhalī > Ibn ʿUlayyah > Yūnus > al-Ḥasan > Qays b. ʿUbād > Liʿalī Akhbirnā

I said to ‘All (Allah be pleased with him) : Tell me about this march of yours. Is this an order that the Messenger of Allah (May peace be upon him) had given you, or is this your opinion that you have? He said: The Messenger of Allah (May peace be upon him) did not give me any order; but this is an opinion that I have.  

أبو داود:٤٦٦٦ – حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ الْهُذَلِيُّ حَدَّثَنَا ابْنُ عُلَيَّةَ عَنْ يُونُسَ عَنِ الْحَسَنِ عَنْ قَيْسِ بْنِ عُبَادٍ قَالَ قُلْتُ لِعَلِيٍّ ؓ

أَخْبِرْنَا عَنْ مَسِيرِكَ هَذَا أَعَهْدٌ عَهِدَهُ إِلَيْكَ رَسُولُ اللَّهِ ﷺ أَمْ رَأْىٌ رَأَيْتَهُ فَقَالَ مَا عَهِدَ إِلَىَّ رَسُولُ اللَّهِ ﷺ بِشَىْءٍ وَلَكِنَّهُ رَأْىٌ رَأَيْتُهُ  

See similar narrations below:

Collected by Suyūṭī
suyuti:4-504b – Qays b. ʿAbād > ʿalī
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السيوطي:٤-٥٠٤b –

"عَنْ قَيْسِ بْنِ عَبادٍ قَالَ: قُلتُ لِعَلِيٍّ: أَخْبِرْنا عَنْ مَسِيرِكَ هَذَا، عَهْدٌ عَهِدَهُ إِلَيكَ رَسُولُ الله ﷺ أَمْ رأى رَأيْتَهُ؟ قَالَ: مَا عَهِدَ إِلَى رَسُولُ الله ﷺ بِشىْءٍ، وَلَكِنَهُ رَأى رَأيْتُهُ".  

[د] أبو داود وابن منيع، [عم] زيادات عبد الله بن أحمد والدورقى، [ض] ضياء المقدسي في مختاره