Surah At-Tawbah · 9:108

“There is a little bit of controversy in the books of tafsir about the reference in verse [9:108] of the Quran — which masjid is being referred to when Allah SWT says, "A mosque founded on taqwa from the first day"? Is it Masjid Quba or Masjid al-Nabawi?”

“one day, when a sahabi came to the Prophet PBUH and asked him, "Which is the masjid referred to by Allah in... (basically [9:108])?", the Prophet PBUH said, "Indeed, wallahi, it is this masjid of mine (i.e., Masjid al-Nabawi)" [Tirmidhi] — this hadith is also authentic.”

“"Do not stand [for prayer] within it, ever. A mosque founded on righteousness from the first day is more worthy for you to stand in. Within it are men who love to purify themselves" [9:108].”