It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The example of the Qur'an is like that of a tied camel; if its owner keeps it tied, it remains under his control, but if he lets it loose, it runs away."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4759
Hadith Gradingحکم دارالسلام:حديث صحيح، م: 789، العمري . وإن كان فيه ضعف . متابع