Surah 95

Surah 95:2

"By Mount Sinai!"

– By Mount Sinai!

This expression appears only once elsewhere in the Quran, and in a slightly different form, at 23.20. Curiously, neither verse connects to Moses and his receiving of the law, nor does the shorter expression “mountain” at 52.1.

- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam