It is narrated from Sayyiduna Abis al-Ghifari (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "He (peace and blessings be upon him) feared six traits for his Ummah: the rule of immature youths, the abundance of police, bribery in judgements, the severing of family ties, treating the shedding of blood lightly, and the rise of a new generation who will make the Qur'an a means of melody and music; they will put forward (to lead the prayer) a man who is not the most learned in fiqh among them, nor the most knowledgeable, nor the most virtuous, but he will be put forward only so that he recites (the Qur'an) to them in the manner of singing."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Musa (may Allah have mercy on him) except Isa (may Allah have mercy on him)."
Hadith Referenceالمعجم الأوسط / باب الألف / 685
Hadith Takhrij«أخرجه أحمد فى «مسنده» برقم: 16286، وابن أبي شيبة فى «مصنفه» برقم: 38891، والطحاوي فى «شرح مشكل الآثار» برقم: 1390، 1389، والطبراني فى «الكبير» برقم: 3162، 60، 57، 58، 59، 61، 62، 63، والطبراني فى «الأوسط» برقم: 8736»