Opposing the Hadeeth of the Messenger of Allaah [ ﷺ ]
Ibn al-Qayyim [ ﺭﺣﻤﻪ ﺍﻟﻠﻪ ] said:

❝Indeed the fine Salaf would become severely critical and very angry against the person who opposed the Hadeeth of the Messenger of Allaah [ ﷺ ] by opinions, or analogies, or regarding something as good just by its virtue, or for the saying of a person no matter who he was!
The Salaf would make Hajr [boycott] the person who opposed the Hadeeth, they would criticize the one who would bring proverbs and parables in the place of Hadeeth, they would not permit other than having obedience to the Messenger [ ﷺ ] with submission, acceptance with hearing and obeying!
It would not cross their hearts to have any hindrance in accepting the Hadeeth so much so that they would need a testimony for that Hadeeth or an action or analogy or that it would have to agree with so and so’s statement, but rather they used to act upon the saying of Allaah [ ﺗﻌﺎﻟﻰ]:
﴿ ﻭَﻣَﺎ ﻛَﺎﻥَ ﻟِﻤُﺆْﻣِﻦٍ ﻭَﻟَﺎ ﻣُﺆْﻣِﻨَﺔٍ ﺇِﺫَﺍ ﻗَﻀَﻰ ﺍﻟﻠَّﻪُ ﻭَﺭَﺳُﻮﻟُﻪُ ﺃَﻣْﺮًﺍ ﺃَﻥْ ﻳَﻜُﻮﻥَ ﻟَﻬُﻢُ ﺍﻟْﺨِﻴَﺮَﺓُ ﻣِﻦْ ﺃَﻣْﺮِﻫِﻢْ ﻭَﻣَﻦْ ﻳَﻌْﺺِ ﺍﻟﻠَّﻪَ ﻭَﺭَﺳُﻮﻟَﻪُ ﻓَﻘَﺪْ ﺿَﻞَّ ﺿَﻠَﺎﻟًﺎ ﻣُﺒِﻴﻨًﺎ ﴾
"It is not for a believer, man or woman, when Allaah and His Messenger have decreed a matter that they should have any option in their decision. And whoever disobeys Allaah and His Messenger, he has indeed strayed in a plain error." [Ahzab: 36]
Allaah [ ﺗﻌﺎﻟﻰ ] said:
﴿ ﻓَﻠَﺎ ﻭَﺭَﺑِّﻚَ ﻟَﺎ ﻳُﺆْﻣِﻨُﻮﻥَ ﺣَﺘَّﻰ ﻳُﺤَﻜِّﻤُﻮﻙَ ﻓِﻴﻤَﺎ ﺷَﺠَﺮَ ﺑَﻴْﻨَﻬُﻢْ ﺛُﻢَّ ﻟَﺎ ﻳَﺠِﺪُﻭﺍ ﻓِﻲ ﺃَﻧْﻔُﺴِﻬِﻢْ ﺣَﺮَﺟًﺎ ﻣِﻤَّﺎ ﻗَﻀَﻴْﺖَ ﻭَﻳُﺴَﻠِّﻤُﻮﺍ ﺗَﺴْﻠِﻴﻤًﺎ ﴾
"But no, by your Lord, they will not [truly] believe until they make you, [O Muhammad], judge concerning that over which they dispute among themselves and then find within themselves no discomfort from what you have judged and submit in [full, willing] submission." [Nisa’: 65]
Allaah [ ﺗﻌﺎﻟﻰ ] said:
﴿ ﺍﺗَّﺒِﻌُﻮﺍ ﻣَﺎ ﺃُﻧﺰِﻝَ ﺇِﻟﻴﻜُﻢ ﻣِﻦ ﺭَّﺑِّﻜُﻢ ﻭَﻻ ﺗَﺘَّﺒِﻌُﻮﺍ ﻣِﻦ ﺩُﻭﻧِﻪِ ﺃَﻭﻟِﻴﺎﺀَﻗﻠﻴﻼً ﻣَﺎ ﺗَﺬَﻛَّﺮُﻭﻥ ﴾
"Follow what has been sent down unto you from your Lord, and follow not any Auliyâ’ [protectors and helpers, etc. who order you to associate partners in worship with Allaah], besides Him [Allaah]. Little do you remember!" [al-A’araaf: 3]
And other Ayaat similar to these.
We have been propelled in to a time that if it is said to one of them: It is established from the Prophet [ ﷺ ] that he said such and such statement! A person would claim: ‘Who said this?!’ Rejection in the face of the Hadeeth and makes his ignorance of the one who said that statement [the Prophet] as an evidence to oppose the Prophet!! And leaving off acting upon the Hadeeth, if he was sincere to himself he would know that his speech is the worst of falsehood and that it is not permissible for a person to reject the Sunnan of the Messenger of Allaah [ ﷺ ] with the likes of this ignorance.
What is uglier than this is his excuse of his ignorance! Since he believes that there is a consensus contracted upon opposing that Sunnah. This is evil speculation regarding the Muslims collectively Since this person ascribes to them that they are united upon opposing the Sunnah of the Messenger of Allaah [ ﷺ ].
What is uglier than that is the excuse of claiming this consensus. This is actually his ignorance, not having knowledge about the one who said this Hadeeth, so the issue returns to preceding his ignorance over that of the Sunnah.
Allaah’s aid is sought.❞
[Ialaam al-Muwaqqa’een, (3/464-465) | Translated By Abbas Abu Yahya Miraath al-Anbiyya]