The Sufficient (Vol 1) · Hadith 457 (#Ḥadīth #1)
Chapter 6 | The Issue that even if only two people would remain on earth one of them would certainly be the Imam, the person with divine authority
1ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنِ ابْنِ الطَّيَّارِ قَالَ سَمِعْتُ أَبَا عَبْدِ الله يَقُولُ لَوْ لَمْ يَبْقَ فِي الارْضِ إِلا اثْنَانِ لَكَانَ أَحَدُهُمَا الْحُجَّةَ.
1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from ibn al-Tayyar who has said the following. “I heard abu ‘Abdallah saying, ‘Would there remain no one on earth except two persons one of them would certainly be the person with Divine authority.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).