According to your Question you regard "*that the Holy Quran is the single most important source of information*" as you said. ---------- I have a "sensibility" about the word "Holy" but i regard that Quran is our most and 1st important source. And i must admit i have also a kind os sensibility about some ahadith (hadiths) that even might be seen as sahih but i will never reject all of them! And as the rules of sahih ahadith are very clear and hard i must accept that sahih hadiths are the 2nd important source ... One should always be careful and check if a Hadith isn't contradictory to a Quranic Verse! ---------- I will quote some verses of the Quran where the Sunna is indicated and try to refer to them later! (In Arabic i will only post the part with the keywords) > 1) Lord, raise up from among them a Messenger who shall recite Your > Revelations to them and teach them the Book and Wisdom and purify > their lives. You art All-Powerful and All-Wise" > > [Surat al-Baqara 2:129] > > رَسُولاً مِّنْهُمْ يَتْلُو عَلَيْهِمْ آيَاتِكَ وَيُعَلِّمُهُمُ > الْكِتَابَ وَالْحِكْمَةَ وَيُزَكِّيهِمْ > > 2) just as (you have found from this: that) We sent the Messenger to > you from among you, who recites to you Our Revelations; who purifies > your lives; who instructs you in the Book and in Wisdom and teaches > you those things that you did not know. > > [Surat al-Baqara 2:151] > > رَسُولاً مِّنكُمْ يَتْلُو عَلَيْكُمْ آيَاتِنَا وَيُزَكِّيكُمْ > وَيُعَلِّمُكُمُ الْكِتَابَ وَالْحِكْمَةَ وَيُعَلِّمُكُم مَّا لَمْ > تَكُونُواْ تَعْلَمُونَ > > 3) As a matter of fact, it is the great favour of Allah to the > Believers that He has raised up in their midst from among themselves a > Messenger who recites to them His Revelations, purifies their lives > and teaches them the Book and Wisdom, though before this these very > people had been in manifest error. > > [Surat Al-I'mran 3:164] > > بَعَثَ فِيهِمْ رَسُولاً مِّنْ أَنفُسِهِمْ يَتْلُو عَلَيْهِمْ آيَاتِهِ > وَيُزَكِّيهِمْ وَيُعَلِّمُهُمُ الْكِتَابَ وَالْحِكْمَةَ > > 4) O Prophet, had not Allah's grace been with you, and had not His > .mercy safeguarded you from their mischief, a party from among them > had decided to involve you in misunderstanding though they were > involving no one but themselves in misunderstanding and could have > done you no harm. Allah has sent down the Book and the Wisdom to you > and taught what you did not know; great indeed is His bounty to you. > > [An-Nissa' 4:113] > > وَأَنزَلَ اللّهُ عَلَيْكَ الْكِتَابَ وَالْحِكْمَةَ > > 5) Tell them plainly, "This is my way. I invite you to Allah. I myself > see my Way in full light and my followers see it, too. And Allah is > free from any defect, and I have nothing to do with those who practice > shirk." > > [Surat Yusuf 12:108] > > قُلْ هَـذِهِ سَبِيلِي أَدْعُو إِلَى اللّهِ عَلَى بَصِيرَةٍ أَنَاْ > وَمَنِ اتَّبَعَنِي وَسُبْحَانَ اللّهِ وَمَا أَنَاْ مِنَ الْمُشْرِكِينَ > > 6) We sent the former Messengers with clear Signs and Books, and now > We have sent the Admonition to you (O Muhammad!), so that you should > make plain and explain to the people the teachings of the Book which > has been sent for them; and so that they (themselves) should ponder > over it. > > [Surat an-Nahl 16:44] > > وَأَنزَلْنَا إِلَيْكَ الذِّكْرَ لِتُبَيِّنَ لِلنَّاسِ مَا نُزِّلَ > إِلَيْهِمْ وَلَعَلَّهُمْ يَتَفَكَّرُونَ > > 7) Remember the Revelations of Allah and the wise sayings which are > recited in your houses.51 Surely, Allah is the Knower of everything > and is All-Aware. > > [Surat al-Ahzaab 33:34] > > وَاذْكُرْنَ مَا يُتْلَى فِي بُيُوتِكُنَّ مِنْ آيَاتِ اللَّهِ > وَالْحِكْمَةِ > > 8) He it is Who has raised a Messenger among the gentiles from among > themselves, who recites to them His Revelations, purifies them and > teaches them the Book and the Wisdom, whereas before this they were > indeed lost in manifest error. > > [Surat al Jumu'a 62:2] > > هُوَ الَّذِي بَعَثَ فِي الْأُمِّيِّينَ رَسُولاً مِّنْهُمْ يَتْلُو > عَلَيْهِمْ آيَاتِهِ وَيُزَكِّيهِمْ وَيُعَلِّمُهُمُ الْكِتَابَ > وَالْحِكْمَةَ In most of these verses (1, 2, 3, 4, 7 and 8) you may find the words the book and Wisdom: In most tafassir the book is interpreted as the Quran and the Wisdom is interpreted as the sunna (according to Qatada) or as the knowledge about the Ahkam of islam (halal/haram etc.). Now as the messenger of Allah (peace be upon him) is the one who teaches us this Wisdom it's clear that Wisdom and Sunna overlap, as without what our Prophet taught us we wouldn't know the number of raka'at in the Prayer at what time to pray and manasik al Hajj and many many things. The 5th Verse in the above list is only an example of that one should follow the Messenger of Allah (peace be upon him) (there might be more expressive Verses for example 59:7) and following him means doing as he did this means in Arabic following his Sunna السنة! The 6th Verse in my list is as i think very clear about the matter that Sunna (Hadith) is an explanation (often practical) in how the Quran should be understood and as you read the Prophet (peace be upon him)n is asked to explain and teach it to them. Explaining is what we find in the Sunna! The 7th Verse is also very expressive as it says that the Women of the Prophet (peace be upon him) should spread out the Wisdom and the revelations of Allah -which they heared/saw in their houses- to people! All these verses (and many more) indicate the necessity of Hadith and Sunna. At least here is a Hadith narrated in other Versions in other books mentioning that Quran isn't the only source of islamic wisdom! > Narrated Al-Miqdam ibn Ma'dikarib: The Prophet (ﷺ) said: Beware! **I > have been given the Qur'an and something like it**, yet the time is > coming when a man replete on his couch will say: Keep to the Qur'an; > what you find in it to be permissible treat as permissible, and what > you find in it to be prohibited treat as prohibited. Beware! The > domestic ass, beasts of prey with fangs, a find belonging to > confederate, unless its owner does not want it, are not permissible to > you If anyone comes to some people, they must entertain him, but if > they do not, he has a right to mulct them to an amount equivalent to > his entertainment. > > [Sunan abi Dawod] > > حَدَّثَنَا عَبْدُ الْوَهَّابِ بْنُ نَجْدَةَ، حَدَّثَنَا أَبُو عَمْرِو > بْنُ كَثِيرِ بْنِ دِينَارٍ، عَنْ حَرِيزِ بْنِ عُثْمَانَ، عَنْ عَبْدِ > الرَّحْمَنِ بْنِ أَبِي عَوْفٍ، عَنِ الْمِقْدَامِ بْنِ مَعْدِيكَرِبَ، > عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ قَالَ " **أَلاَ > إِنِّي أُوتِيتُ الْكِتَابَ وَمِثْلَهُ مَعَهُ** أَلاَ يُوشِكُ رَجُلٌ > شَبْعَانُ عَلَى أَرِيكَتِهِ يَقُولُ عَلَيْكُمْ بِهَذَا الْقُرْآنِ > فَمَا وَجَدْتُمْ فِيهِ مِنْ حَلاَلٍ فَأَحِلُّوهُ وَمَا وَجَدْتُمْ > فِيهِ مِنْ حَرَامٍ فَحَرِّمُوهُ أَلاَ لاَ يَحِلُّ لَكُمْ لَحْمُ > الْحِمَارِ الأَهْلِيِّ وَلاَ كُلُّ ذِي نَابٍ مِنَ السَّبُعِ وَلاَ > لُقَطَةُ مُعَاهِدٍ إِلاَّ أَنْ يَسْتَغْنِيَ عَنْهَا صَاحِبُهَا وَمَنْ > نَزَلَ بِقَوْمٍ فَعَلَيْهِمْ أَنْ يَقْرُوهُ فَإِنْ لَمْ يَقْرُوهُ > فَلَهُ أَنْ يُعْقِبَهُمْ بِمِثْلِ قِرَاهُ " . *In Arabic: it said I have been given the book so the translator used the interpretation kitab=book=Quran!