“Wa-ṭūri Sīnīn”
“By Mount Sīnīn.” (al-Tīn 95:2)
“Ṭūr” means mountain, and “Sīnīn” identifies the sacred Sinai site known from the story of Moses. Explaining the name through the familiar “Sīnāʾ” is a straightforward example of clarification by an alternate designation.
Not every instance of ibdāl involves a figure of speech. A place may simply have related names or forms, unlike “God’s coloring,” where a metaphor performs the key rhetorical work.
The identification is significant because the mountain is associated in Qur’anic narrative with divine revelation to Moses.