We will surely test you with a measure of fear and hunger and a loss of wealth, lives, and fruits... Qur'an 2:155

A hadith of Imam al-Sadiq (a) states that this verse is about Imam Mahdi (a) and his companions, who will gather together without prior appointment.

This is the Book, there is no doubt in it, a guidance to the Godwary, (2) who believe in the Unseen, maintain the prayer, and spend out of what We have provided for them; Qur'an 2:2-3.

Allah has promised those of you who have faith and do righteous deeds that He will surely make them successors in the earth Qur'an 24:55

And We desired to show favour to those who were abased in the land, and to make them imams, and to make them the heirs, Qur'an 28:5

Certainly We wrote in the Psalms, after the Torah: ‘Indeed My righteous servants shall inherit the earth.’ Qur'an 21:105