Inscription XPb, near the eastern stairs of the Apadana of Persepolis.
It says:

A great god is Ahuramazda, who created this earth, who created that heaven, who created man, who created happiness for man, who made Xerxes king: the king of many kings, one ruler of many rulers.
I am Xerxes, the great king, king of kings, king of all nations, having various kinds of people, king in this great earth far and wide, the son of king Darius, an Achaemenid.
The great king Xerxes says: What has been done by me here, and what has been done by my father, all this was done by the grace of Ahuramazda. May Ahuramazda and the other gods preserve me, my kingdom, and what has been done by me.