Jundub ibn Abdullah reported: The Messenger of Allah, peace and blessings be upon him, said:
مَثَلُ الْعَالِمِ الَّذِي يُعَلِّمُ النَّاسَ الْخَيْرَ وَيَنْسَى نَفْسَهُ كَمَثَلِ السِّرَاجِ يُضِيءُ لِلنَّاسِ وَيَحْرِقُ نَفْسَهُ
The parable of the scholar who teaches people virtue but forgets himself, is that of a lamp giving people light while it burns itself.
Source: al-Mu’jam al-Kabīr, Grade: Sahih
