In Biharul Anwar it is narrated from His Eminence, Imam Baqir (as) regarding the qualities of Imam Mahdi (aj) that:
“All wealth from the exterior and the interior of the earth shall be gathered for him and he will tell the people:
Come here, it was because of this that you severed relations, shed unlawful blood and indulged in unlawful deeds. Then he will bestow to them in such a measure as none before him has ever done.”
Reference:
Biharul Anwar; Vol. 52/351