Surah At-Tawba, Verse 108
Translation — Sahih International
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; and Allah loves those who purify themselves.
Source
Kur'an-ı Kerim, Tevbe Suresi 9:108
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/9-suresi-108-ayet