Al-Kāfi

Hadith 448
twelve-imams
4ـ أَحْمَدُ بْنُ مِهْرَانَ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنِ الْحُسَيْنِ بْنِ أَبِي الْعَلاءِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) قَالَ قُلْتُ لَهُ تَبْقَى الارْضُ بِغَيْرِ إِمَامٍ قَالَ لا.
4. Ahmad ibn Mihran has narrated from Muhammad ibn Ali from al-Husayn Ibn Abu ‘Ala’ from Abu ‘Abdallah (a.s.): I (the narrator) said to him: “Can the earth be without Imam?” The Imam (a.s.) said, “No.”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī