The book Iranians in the Qur'an and Traditions by Ali Abtahi[8] mentions that a wall with characteristics mentioned in the verses of the Qur'an exists in the Dariel passage in the Caucasus mountains, and that there is even a stream nearby which is called "Saeres"[9] by the locals. According to this source, local Armenians called this wall "Behag Gurai" (meaning "The passage of Cyrus").
In Arabic translations of the Old Testament, the word "Dhul Qarnayn" (Hebrew: Ba`al Haqqərānayim בעל הקרנים) appears once in the Old Testament, in the Book of Daniel 8:20:
“ [10]أَمَّا الْكَبْشُ الَّذِي رَأَيْتَهُ ذَا الْقَرْنَيْنِ فَهُوَ مُلُوكُ مَادِي وَفَارِسَ
Translation: The ram that you saw,
the one with the horns, represents the kings of Media and Persia.[11] ”
Dhul-Qarnayn expanded his empire in three directions (east, west and north), which is the same as Cyrus' expansions, where he did not make southern expansions (Achaemenid southern exansions began after Cyrus). It should be noted that Alexander made his expansions towards south and east.