It is a matter of regret that according to the intepretation found in theworks of some commentators and modern authors, that it is permissible todo what is stated in the last two examples.
"In the fourth example, if not for the hadeeths, some of which have been mentioned, we would have considered lawful what Allah has made unlawful through the dictum of the holy Prophet (sallaallaahu `alayhi wa sallam) like predatory animals, and the birds which have claws.
And so is the fifth example, if not for the hadeeths, in regard to this question, we would have considered lawful what Allah has prohibited through the words of His Prophet (sallaallaahu `alayhi wa sallam) like gold and silk.
It is for this, some forebearers (As-Salaf) say that ‘Sunnah’ pronounces judgement of The Book (al-Qur’an).]
Consumption of the predatory animals, and the wearing of gold and silk by referring their interpretation only to The Qur’an.
Today, a sect exists, called “Quranites” who comment according to their whims and fancies; without seeking the explanation of the authentic Sunnah. They only accept and follow the Sunnah which suit their desires, the rest they throw behind. The Prophet salaallaahu `alayhi wa sallam is reported to have said that:
“None of you reclines on his bed, the order comes to him on an affair which I am commanded to do or not to do, he says: 'I do not know, what is found in the Book of Allah, we follow.” (Tirmithi). According to another report: "What is found in The Book of Allah as ‘Haram’ we pronounce it ‘haram’ (forbidden). Surely, I am given The Qur’an and its example with it.’ Yet, according to another report: “What the Messanger of Allah has forbidden, Allah has prohibited it.”
It is a matter of regret that one renowned scholar has written a book on Islamic Law and its dogma, and in its preface, he says that he has written it and that he has made reference only to the Qur’an.
This true hadith gives positive evidence that the divine law of Islam - As-Shariah - is not mere Qur’an, but Qur’an and Sunnah. Therefore, whoever hold fast ton one source for reference to the exclusion of the other, he held fast to none of them, since both complement each other.
The Qur’an says “Whoever obeys the Messanger, obeys Allah”. Allah says: “No, by your Lord, they do not believe until they submit to your adjudication in all disputes between them, then they do not find themselves oppressed with your decisions and they completely submit.” (4:65) Again, Allah says: “When a matter has been decided by Allah and His Messanger, it does not behove a believer, man or woman, to have choice in their matter. One who disobeys Allah and His Messanger, he is indeed on a clearly wrong Path.” (33:36) Furthermore, Allah says: “What the Messanger teaches you, take it; and what he forbids you, avoid doing it.”(59:7)
In connection with this verse, I am marveled by what is corroborated by Ibn Masud (Allah be pleased with him) that is, a woman came to him and told him: “You who says: May Allah’s curse be on Al-Namisat [a woman who plucks hers or others eye-brows - to be a thin line - to seek beauty. Such an act is fobidden. It is a mean to change the form of Allah’s creation] and Al-Motanamisat [a woman who asks others to do it for her] and those who tatoo.” He said: “Yes.” She said, “I read the Book of Allah (Al-Qur’an) from its beginning to its end, I did not find what you have said.” He told her: “If you have read it, you would have found it. As for your reading what the Messanger teaches you, take it, and what he forbids you, avoid doing it.” She said: “Certainly”. He said: "I have heard the Messanger of Allah (salaallaahu `alayhi wa sallam) says: “May Allah’s curse be on Al-Namisat.” (Bukhari & Muslim)
—source: islaam.com