Al-Kāfi

Hadith 2105
quran
18ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنِ الْحُسَيْنِ بْنِ أَحْمَدَ الْمِنْقَرِيِّ قَالَ سَمِعْتُ أَبَا إِبْرَاهِيمَ (عَلَيهِ السَّلام) يَقُولُ مَنِ اسْتَكْفَى بِ‏آيَةٍ مِنَ الْقُرْآنِ مِنَ الشَّرْقِ إِلَى الْغَرْبِ كُفِيَ إِذَا كَانَ بِيَقِينٍ.
18. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from al- Husayn ibn Ahmad al-Minqari who has said the following: “I heard abu Ibrahim (a.s.) saying, ‘If one considers one verse of the Holy Quran sufficient (for his protection) from East to West, it is enough [with certainty].”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī