Al-Kāfi - Volume 1 > Chapter on the quality of knowledge its virtue and the virtue of the scholars
Hadith #8

8ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ وَمُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ سَيْفِ بْنِ عَمِيرَةَ عَنْ أَبِي حَمْزَةَ عَنْ ابي جعفر (عَلَيْهِ السَّلام) قَالَ عَالِمٌ يُنْتَفَعُ بِعِلْمِهِ أَفْضَلُ مِنْ سَبْعِينَ أَلْفَ عَابِدٍ.

8. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr and Muhammad ibn Yahya from Ahmad ibn Muhammad from ibn abu ‘Umayr from Sayf ibn ‘Umayr from abu Hamza from abu Ja‘far (a.s.) who has said the following. “A scholar who benefits from his knowledge is better than seventy thousand worshippers.”