Al-Kāfi - Volume 1 > Chapter on Utilization of Knowledge
Hadith #4

4ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ عَنِ الْمِنْقَرِيِّ عَنْ عَلِيِّ بْنِ هَاشِمِ بْنِ الْبَرِيدِ عَنْ أَبِيهِ قَالَ جَاءَ رَجُلٌ إِلَى عَلِيِّ بن الحسين (عَلَيْهما السَّلام) فَسَأَلَهُ عَنْ مَسَائِلَ فَأَجَابَ ثُمَّ عَادَ لِيَسْأَلَ عَنْ مِثْلِهَا فَقَالَ عَلِيُّ بن الحسين (عَلَيْهما السَّلام) مَكْتُوبٌ فِي الانْجِيلِ لا تَطْلُبُوا عِلْمَ مَا لا تَعْلَمُونَ وَلَمَّا تَعْمَلُوا بِمَا عَلِمْتُمْ فَإِنَّ الْعِلْمَ إِذَا لَمْ يُعْمَلْ بِهِ لَمْ يَزْدَدْ صَاحِبُهُ إِلا كُفْراً وَلَمْ يَزْدَدْ مِنَ الله إِلا بُعْداً.

4. Ali ibn Ibrahim has narrated from his father from al-Qasim ibn Muhammad from al-Minqari from Ali ibn Hashim ibn al-Burayd from his father who has said the following. “A man came to (Imam) Ali ibn al-Husayn (a.s.) and asked him certain questions and the Imam answered his questions. The man then wanted to ask similar questions but the Imam said, “It is written in the Gospel, ‘Do not inquire to know what you do not know until you practice what you know because not practicing what one knows does not increase to one anything but disbelief and nor it increases anything to one’s relation with Allah but alienation.”