Al-Kāfi - Volume 1 > Chapter on the quality of knowledge its virtue and the virtue of the scholars
Hadith #9

9ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ أَحْمَدَ بْنِ إِسْحَاقَ عَنْ سَعْدَانَ بْنِ مُسْلِمٍ عَنْ مُعَاوِيَةَ بْنِ عَمَّارٍ قَالَ قُلْتُ لابِي عَبْدِ الله (عَلَيْهِ السَّلام) رَجُلٌ رَاوِيَةٌ لِحَدِيثِكُمْ يَبُثُّ ذَلِكَ فِي النَّاسِ وَيُشَدِّدُهُ فِي قُلُوبِهِمْ وَقُلُوبِ شِيعَتِكُمْ وَلَعَلَّ عَابِداً مِنْ شِيعَتِكُمْ لَيْسَتْ لَهُ هَذِهِ الرِّوَايَةُ أَيُّهُمَا أَفْضَلُ قَالَ الرَّاوِيَةُ لِحَدِيثِنَا يَشُدُّ بِهِ قُلُوبَ شِيعَتِنَا أَفْضَلُ مِنْ أَلْفِ عَابِدٍ.

9. Al-Hassan ibn Muhammad has narrated from Ahmad ibn Ishaq from Sa‘dan ibn Muslim from Mu‘awiya ibn ‘Ammar who has said the following. “I asked (Imam) abu ‘Abdallah (a.s.), “There is a man who recounts your Hadith and spreads them among people and ties them to their hearts and the hearts of your followers. Also perhaps there is a worshipper among your followers who does not narrate your Hadith. Which of these two people is better?” The Imam replied, “The one who narrates our Hadith and ties them up to the hearts of our followers is better than seventy thousand worshippers.”