Surah 16 (Nah'l), Ayah 43 commands us to seek answers from the knowledgeable in the Quran.
وَمَا أَرْسَلْنَا مِن قَبْلِكَ إِلاَّ رِجَالاً نُّوحِي إِلَيْهِمْ
فَاسْأَلُواْ أَهْلَ الذِّكْرِ إِن كُنتُمْ لاَ تَعْلَمُونَ
And before Thy time [O' Muhammad], We have sent men to whom We have revealed; —[O people] refer to the Folk of Dhik'r when you do not know.
Commentary
Al‑Dhik'r refers to the Holy Quran itself; and it is also one of the names of the Holy Prophet. Since they are the seas of knowledge in Islam, Ahlul Bayt are regarded as the Ahlul Dhik'r, as Imam Al‑Saadiq and others have affirmed.[7]
[Dhik'rألـذكــر ] literally means to call back to memory, or in other words to have something in the conscious mind]. Dhik'r has been used figuratively for a stimulus which brings an object into the focus of conscious ness. To be conscious of Allah, the Quran, the other scriptures, and the Holy Prophet have been described as Dhik’r.
Dhik'r means to be perpetually conscious of Allah, and Ahl refers to the persons always conscious of Allah. Therefore, Ahlul Dhik'r refers to the few who are constantly in consciousness of the Divine, whose characters are immaculate, who have been purified by the Almighty Himself, i.e., Ahlul Bayt.
The Quran also attests that Ahlul Bayt are the folk of the Quran; who should be referred to when men are after the Quran's meaning and interpretation. Ahlul Bayt know the inmost meaning of the Quran as no one else. The Quran attests to them as the ones with deep and encyclopedic knowledge.
The Divine mercy guides the sincere seekers of the truth to turn to Ahlul Dhik'r, (the Prophet and his Ahlul Bayt) for knowledge of the Divine. It says, “Refer to the Folk of Dhik'r when you do not know,” meaning to find answers from them.
7, (See Al‑Haakim Al‑Haskani in Shawaahid Al‑Tanzeel, Vol. 1, Page 337.)
source : http://www.islamicbooks.info