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

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 (a.s.) saying, 'Would there remain no one on earth except two persons one of them would certainly be the person with Divine authority."

H 442, Ch. 6, h 2

Ahmad ibn Idris and Muhammad ibn Yahya together have narrated from Ahmad ibn Muhammad from Muhammad ibn 'Isa from abu 'Ubayd from Muhammad ibn Sinan from abu Hamza ibn al-Tayyar from abu 'Abdallah (a.s.) who has said the following. "Would there remain only two people on earth, one of them would the person with divine authority over the other."

Muhammad ibn al-Hassan has narrated from Sahl ibn Ziyad from Muhammad ibn 'Isa a similar Hadith.

H 443, Ch. 6, h 3

Muhammad ibn Yahya has narrated from those who he has mentioned from al-Hassan ibn Musa al-Khashshab from Ja'far ibn Muhammad from Kiram from abu 'Abdallah (a.s.) who has said the following.

"If of all the people there will remain only two man one of them will be the Imam. He also said, 'The last person to die will be the Imam (a.s.) so that no one could complain against Allah leaving him without Imam, the person with Divine authority over him.'"

H 444, Ch. 6, h 4

A number of our people has narrated from Ahmad ibn Muhammad al-Barqi from Ali ibn Isma'il from ibn Sinan from Hamza ibn al-Tayyar who has said the following.

"I heard Imam abu 'Abdallah (a.s.) saying, 'Would there remain on earth no one except two people one of them will be the person with Divine authority or the second one will be the person with Divine authority (uncertainty is from the narrator)."

H 445, Ch. 6, h 5

Ahmad ibn Muhammad has narrated from Muhammad ibn al-Hassan from al-Nahdi from his father from Yunus ibn ya'qub from abu 'Abdallah who has said the following. "Would there remain no one except two people one of them will certainly be the Imam."