Surah An-Nisaa, Verse 137
Translation — Sahih International
Indeed, those who have believed then disbelieved, then believed, then disbelieved, and then increased in disbelief - never will Allah forgive them, nor will He guide them to a way.
Source
Kur'an-ı Kerim, Nisâ Suresi 4:137
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/4-suresi-137-ayet