Al-Kāfi

Hadith 45
intellect
8ـ مُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ جَمِيلِ بْنِ دَرَّاجٍ عَنْ أَبَانِ بْنِ تَغْلِبَ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) قَالَ لَوَدِدْتُ أَنَّ أَصْحَابِي ضُرِبَتْ رُءُوسُهُمْ بِالسِّيَاطِ حَتَّى يَتَفَقَّهُوا.
8. Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan from Ibn Abi ‘Umayr from Jamil ibn Durraj from Aban ibn Taghlib that Abu ‘Abdillah (al-Sadiq) (as) said, "I would have even liked that my companions' heads are lashed with whips for them to gain a comphrensive understanding [of the religion].
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī