Al-Kāfi

Hadith 450
twelve-imams
6ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ أَبِي حَمْزَةَ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) قَالَ إِنَّ الله أَجَلُّ وَأَعْظَمُ مِنْ أَنْ يَتْرُكَ الارْضَ بِغَيْرِ إِمَامٍ عَادِلٍ.
6. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from al-Qasim ibn Muhammad from Ali ibn abu Hamza from abu Basir from abu ‘Abdallah (a.s.) who has said the following “Allah, the Most Holy, the Most High, is far greater and above leaving the earth without an Imam of justice.”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī