The emigration of Abu Bakr (may Allah be pleased with him) to Madinah with all his wealth

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) asked Jibril (peace be upon him): "Who will emigrate with me?" He replied: Abu Bakr al-Siddiq (may Allah be pleased with him).
This hadith is sahih (authentic) and gharib (singular) in both its chain and its text, but the two Shaykhs did not record it.

It is narrated from Sayyidah Asma' bint Abi Bakr (may Allah be pleased with them both) that when the Messenger of Allah (peace and blessings be upon him) set out from Makkah for Madinah, and Sayyiduna Abu Bakr (may Allah be pleased with him) was with him (peace and blessings be upon him), Sayyiduna Abu Bakr (may Allah be pleased with him) took all his wealth with him, which was five or six thousand dirhams. My grandfather Abu Quhafah, who had lost his sight, came to me and said: "By Allah! This man (Abu Bakr) has grieved you with regard to his wealth as well as his own person." I said: "Not at all, dear father! He has left a great deal of good (wealth) for us." So I took some stones and placed them in the niche (alcove) of the house where Sayyiduna Abu Bakr (may Allah be pleased with him) used to keep his wealth, and then I covered those stones with a cloth. Then I came, took his hand and placed it on the cloth, and he said: "If he has left this (wealth), then it is fine." Sayyidah Asma' (may Allah be pleased with her) says: By Allah! He had not left us anything, little or much.
This hadith is sahih (authentic) on the condition of Muslim, but the two Shaykhs did not record it.