It is narrated from Sayyiduna Jabir (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Among the sources of taqwa (God-consciousness) is that, along with what you already know, you keep learning what you do not yet know; and falling short in what you already know is that there is little increase in it. What makes a man lose interest in knowledge he does not have is only that he benefits little from the knowledge he has already gained."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu al-Zubayr except Yasin."
Hadith Referenceالمعجم الأوسط / باب الألف / 2492
Hadith Gradingمحدثین:إسناده ضعيف جدًّا، فيه ياسين الزيات منكر الحديث
Hadith Takhrij«قال الهيثمي: فيه ياسين الزيات وهو منكر الحديث «مجمع الزوائد ومنبع الفوائد، ج 1، ص 136»»