Certainly We wrote in the Psalms, after the Torah: ‘Indeed My righteous servants shall inherit the earth.’(al-Anbiya:105) 

Its reference is the content of verse No. 48 of the current Surah which indicates that the Torah is /ŏikr/ (reminder) where it says:

Some Islamic narrations have explicitly commented this verse upon the followers of Hadrat Mahdi (pbuh). This meaning is the statement of a high and clear aspect of it which does not confine the generality of the concept of the verse. 

The system of creation is a manifest reference for the acceptance of a proper social system of the world of humanity in future. This meaning is the same thing which is understood from the verse under discussion and the traditions concerning the advent of ‘the Worldly Great Reformer’, Hadrat Mahdi, (may our souls be sacrificed to him). 

در المنثور سیوطی ج 4 ص 341.