Salafi scholar Hussain Saleem Asad Ad-Darani has investigated Musnad Al-Humaydi (Died 219 AH) and in he quotes a narration in preface like this :
يا أيها الناس؛ إني قد تركت فيكم ما إن اعتصمتم به فلن تضلوا أبدا، كتاب الله، وسنة نبيه.
Oh People ! I am leaving amomg you two things so that you may not deviate anytime. One is Book of Allah and another is Sunnah of his Prophet (ﷺ).
In footnotes he quotes it from Sahih Muslim and Musnad Abu Ya'la Mosuli.
Musnad - Al-Humaydi // Volume 1 // Page 11 // Preface // Edn. Dar ul Mugni Riyadh Saudi Arabia.
But this narration isn't present in any of these books rather thess books have a narration at this page number where word " Ahlulbayt (as)" is present instead of " Sunnah ".
Muslim bin Hajaj Neysaburi (Died 261 AH) narrated :
حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، وَشُجَاعُ بْنُ مَخْلَدٍ، جَمِيعًا عَنِ ابْنِ عُلَيَّةَ، قَالَ زُهَيْرٌ حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ، حَدَّثَنِي أَبُو حَيَّانَ، حَدَّثَنِي يَزِيدُ بْنُ حَيَّانَ، قَالَ انْطَلَقْتُ أَنَا وَحُصَيْنُ، بْنُ سَبْرَةَ وَعُمَرُ بْنُ مُسْلِمٍ إِلَى زَيْدِ بْنِ أَرْقَمَ فَلَمَّا جَلَسْنَا إِلَيْهِ قَالَ لَهُ حُصَيْنٌ لَقَدْ لَقِيتَ يَا زَيْدُ خَيْرًا كَثِيرًا رَأَيْتَ رَسُولَ اللَّهِ صلى الله عليه وسلم وَسَمِعْتَ حَدِيثَهُ وَغَزَوْتَ مَعَهُ وَصَلَّيْتَ خَلْفَهُ لَقَدْ لَقِيتَ يَا زَيْدُ خَيْرًا كَثِيرًا حَدِّثْنَا يَا زَيْدُ مَا سَمِعْتَ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم - قَالَ - يَا ابْنَ أَخِي وَاللَّهِ لَقَدْ كَبِرَتْ سِنِّي وَقَدُمَ عَهْدِي وَنَسِيتُ بَعْضَ الَّذِي كُنْتُ أَعِي مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم فَمَا حَدَّثْتُكُمْ فَاقْبَلُوا وَمَا لاَ فَلاَ تُكَلِّفُونِيهِ . ثُمَّ قَالَ قَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَوْمًا فِينَا خَطِيبًا بِمَاءٍ يُدْعَى خُمًّا بَيْنَ مَكَّةَ وَالْمَدِينَةِ فَحَمِدَ اللَّهَ وَأَثْنَى عَلَيْهِ وَوَعَظَ وَذَكَّرَ ثُمَّ قَالَ " أَمَّا بَعْدُ أَلاَ أَيُّهَا النَّاسُ فَإِنَّمَا أَنَا بَشَرٌ يُوشِكُ أَنْ يَأْتِيَ رَسُولُ رَبِّي فَأُجِيبَ وَأَنَا تَارِكٌ فِيكُمْ ثَقَلَيْنِ أَوَّلُهُمَا كِتَابُ اللَّهِ فِيهِ الْهُدَى وَالنُّورُ فَخُذُوا بِكِتَابِ اللَّهِ وَاسْتَمْسِكُوا بِهِ " . فَحَثَّ عَلَى كِتَابِ اللَّهِ وَرَغَّبَ فِيهِ ثُمَّ قَالَ " وَأَهْلُ بَيْتِي أُذَكِّرُكُمُ اللَّهَ فِي أَهْلِ بَيْتِي أُذَكِّرُكُمُ اللَّهَ فِي أَهْلِ بَيْتِي أُذَكِّرُكُمُ اللَّهَ فِي أَهْلِ بَيْتِي " .
Yazid b. Hayyan reported, I went along with Husain b. Sabra and 'Umar b. Muslim to Zaid b. Arqam and, as we sat by his side, Husain said to him:
Zaid. you have been able to acquire a great virtue that you saw Allah's Messenger (ﷺ) listened to his talk, fought by his side in (different) battles, offered prayer behind me. Zaid, you have in fact earned a great virtue. Zaid, narrate to us what you heard from Allah's Messenger (ﷺ). He said: I have grown old and have almost spent my age and I have forgotten some of the things which I remembered in connection with Allah's Messenger (ﷺ), so accept whatever I narrate to you, and which I do not narrate do not compel me to do that. He then said: One day Allah's Messenger (ﷺ) stood up to deliver sermon at a watering place known as Khumm situated between Mecca and Medina. He praised Allah, extolled Him and delivered the sermon and. exhorted (us) and said: Now to our purpose. O people, I am a human being. I am about to receive a messenger (the angel of death) from my Lord and I, in response to Allah's call, (would bid good-bye to you), but I am leaving among you two weighty things: the one being the Book of Allah in which there is right guidance and light, so hold fast to the Book of Allah and adhere to it. He exhorted (us) (to hold fast) to the Book of Allah and then said: The second are the members of my household I remind you (of your duties) to the members of my family.
Sahih - Muslim // Volume 4 // Page 216 // Number 2408 // Edn. Dar ul Khayr Riyadh Saudi Arabia.
Abu Ya'la Mosuli (Died 307 AH) narrated also this narration twice in his book.
See how deceptive these sunni investigators who try very hard to distort the words of Hadith of Thaqalayn (Book of Allah and Ahlulbayt of Prophet (ﷺ).
