The extreme importance of Hadith: I've seen people nowadays deny hadith altogether and only accept the Quran,so I'll refute them one by one,and also their claims.
So first let me refute them from their roots,that Muhammad SAW is not needed for the Quran.
First of all Muhammad SAW is VERY important according to the Quran itself,infact he is the main model for the Muslims.
According to Surah al Sajda,verse 21
"There has certainly been for you in the Messenger of Allah an excellent pattern for anyone whose hope is in Allah and the Last Day and [who] remembers Allah often."
This pattern that the Quran mentions is not to be found in the Quran,but in the hadith,then my argument of interpretation comes,which the Quranist can never escape,and it destroys the Quranist from his roots
"And We revealed to you [O Muhammad] the message [Qur’an] that you may make clear to the people what was sent down to them and that they might give thought."[Qur’an 16:44]
This says the Prophet SAW himself was COMMANDED to interpret the Quran,the Interpretation is not in the Quran,but the hadith,nowhere else will you find it,except in the hadith
Muhammad SAW also has been made for Muslims a Judge,as seen in this verse
"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." [Qur’an 4:65]
So nor is Muhammad SAWs judgement found in the Quran,but in the hadith,now to my other 3 arguments before I get to refuting claims.
My argument is that,the Quran never tells you you can't have sex with a five year old,only hadith forbids that,the Quran tells you beat your wife,but the Hadith explains and says not to beat your wife very harshly,but very lightly.
Infact the Quran supports the hadith,and says there was a revelation,a revelation NOT INSIDE the Quran,infact outside the Quran,this outside revelation is mentioned in Surah an najm
Your companion [Muhammad] has not strayed, nor has he erred,"(53:2)
"Nor does he speak from [his own] inclination."(53:3)
"It is not but a revelation revealed,"(53:4)
"Taught to him by one intense in strength -"(53:5)
"One of soundness. And he rose to [his] true form"(53:6)
This whole description of the revelation,fits with the hadith.
And my last one is that the Prophet SAWs commandments are important,and the commandments arent in the Quran,but the hadith
“And let those who oppose the Messenger's (Muhammad (blessings and peace of Allah be upon him)) commandment (i.e. his Sunnah— legal ways, orders, acts of worship, statements) (among the sects) beware, lest some Fitnah (disbelief, trials, afflictions, earthquakes, killing, overpowered by a tyrant) should befall them or a painful torment be inflicted on them”
[an-Noor 24:63].
Now to the verses the Hadith-rejector provides,and once this has been refuted,we can conclude.
This is the most quoted verse by Quranists,Quran 6:114-5.
This first of all,is an error by the Quranist
The verse says Anyone who does shirk,and seeks Judges other than Allah
"[Say], "Then is it other than Allah I should seek as judge while it is He who has revealed to you the Book explained in detail?" And those to whom We [previously] gave the Scripture know that it is sent down from your Lord in truth, so never be among the doubters."(6:114)
And the book explained in detail,who explained this book in detail,and where is this explanation found?
The Quran says the Messenger SAW explained it
":And We revealed to you [O Muhammad] the message [Qur’an] that you may make clear to the people what was sent down to them and that they might give thought. [Qur’an 16:44]"
So therefore it can only mean the hadith,and not the Quran only.
Now the second argument that they bring up,Is how do we know the hadith are true??
First of all,how do we know the Quran are true? through chain of narration,afcourse the Quran has a solid chain of narration and therefore due to that it is unchanged, and we have the earliest Quran aswell.
Same is with the hadith,The hadith was transmitted through solid chain of narration,we first look at,and then look at classical commentaries on these narrations,then decide which hadith is true or not, And we have As Sahifa Us Sadiqa,which was a hadith written by Sahabi Abdullah Bin Amr Al A'as. R.A
Now claiming these ways donot lead us to truth is an absurdity,thats like saying,Quran doesn't lead us to truth,we know these hadith are true due to their historical and narrative authenticity,not due to a presupposition a hadith rejector makes.
Therefore we can conclude.
That The hadith is indeed a authentic Islamic source and is indeed a outside-revelation that Muslims must follow in light of the Quran