It is narrated from Sayyiduna Abu Malik al-Ash'ari (may Allah be pleased with him) that he heard the Messenger of Allah (peace and blessings be upon him) say: "I fear for my Ummah only three things: that wealth becomes abundant for them, so that they envy one another and fight one another; that the Books are opened up for them, so that the believer seeks its interpretation, though no one knows its interpretation except Allah, and those firmly grounded in knowledge say: We believe in it, all of it is from our Lord, and none take heed except people of understanding; and that they see the one who possesses their knowledge and neglect him, and pay no heed to him."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3429