I asked Jabir bin Samura about a hadith of the Messenger of Allah ﷺ, and he said that the Messenger of Allah ﷺ said, "The religion will remain established until there are twelve caliphs from Quraysh. Then liars will appear before the Hour. Then a band of Muslims will go forth and bring out the treasure of the White Palace of Khosrau and the family of Khosrau. When Allah grants any of you good, let him begin with himself and his family. And I will go ahead of you to the Pool."
حدثنا حماد بن خالد حدثنا ابن أبي ذئب عن المهاجر بن مسمار
سألت جابر بن سمرة عن حديث رسول الله ﷺ فقال قال رسول الله ﷺ لا يزال الدين قائما حتى يكون اثنا عشر خليفة من قريش ثم يخرج كذابون بين يدي الساعة ثم تخرج عصابة من المسلمين فيستخرجون كنز الأبيض كسرى وآل كسرى وإذا أعطى الله تبارك وتعالى أحدكم خيرا فليبدأ بنفسه وأهله وأنا فرطكم على الحوض
Its isnad is sahih. Muhajir bin Mismar is the freed slave of Saad bin Abu Waqqas, and he is trustworthy, his hadith appearing in Muslim. Amir bin Saad is the son of Abu Waqqas, and he is the maternal cousin of Jabir bin Samura. Muslim narrated the hadith, 3/1453, no. 1822.