Achaemenid Royal Inscriptions: collection of Old Persian cuneiform texts from the sixth, fifth, and fourth centuries BCE, left by the Achaemenid kings on their official monuments.
Inscription XPd can be found beside the stairs of the Palace of Xerxes in Persepolis and on the two pillars that once carried the roof of the northern portico of the royal mansion.
baga \ vazraka \ Auramazdâ \ hya \ i
mâm \ bûmim \ adâ \ hya \ avam
\ asmânam \ adâ \ hya \ martiya
m \ adâ \ hya \ šiyâtim \ adâ \ mar
tiyahyâ \ hya \ Xšayâršâm \ x
šâyathiyam \ akunauš \ aivam \ par
ûnâm \ xšâyathiyam \ aivam \ parû
nâm \ framâtâram \ adam \ Xšayârš
â \ xšâyathiya \ vazraka \ xšâyathiya \
xšâyathiyânâm \ xšâyathiya \ dahy
ûnâm \ paruvzanânâm \ xšâyathiya
\ ahiyâyâ \ bûmiyâ \ vazrakâyâ
\ dûraiy \ apiy \ Dârayavahauš \ xš
âyathiyahyâ \ puça \ Haxâmanišiya \
thâtiy \ Xšayâršâ \ xšâyathiya \ va
zraka \ vašnâ \ Auramazdâha \ ima \ had
iš \ adam \ akunavam \ mâm \ Auramaz
dâ \ pâtuv \ hadâ \ bagaibiš \ utama
iy \ xšaçam \ utâ \ tyamaiy \ kartam
XPd
A great god is Ahuramazda, who created this earth, who created that heaven, who created humankind, who created happiness for humankind, who made Xerxes king, sole ruler of many, sole sovereign of many.
I am Xerxes, the great king, the king of kings, the king of all kinds of people, the king of this earth great and wide, the son of king Darius, the Achaemenid.
The great king Xerxes says: By the grace of Ahuramazda, I built this palace. May Ahuramazda and the gods protect me, my kingdom, and what I did!
Literature
Pierre Lecoq, Les inscriptions de la Perse achéménide (1997 Paris)