The Holy Quran 20:12 — Surah Taha
Arabic text
إِنِّىٓ أَنَا۠ رَبُّكَ فَٱخْلَعْ نَعْلَيْكَ ۖ إِنَّكَ بِٱلْوَادِ ٱلْمُقَدَّسِ طُوًى
Translation
“I am indeed your Rabb, so remove your shoes for you are on the holy plain of Tuwa."
Tafsir (excerpt) — Tafsir Usmani
The valley of Tuwa: “Tuwa” is the name of that valley. Perhaps that valley was blessed already, or perhaps it became so now. The sandals of Musa ﵇ were impure, so he was made to take them off. As for khuffs (leather socks) or shoes, if they are pure, one may pray in them; the full ruling should be looked up in the books of fiqh.
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