Surah Ali 'Imran 3:90

إِنَّ ٱلَّذِينَ كَفَرُوا۟ بَعْدَ إِيمَـٰنِهِمْ ثُمَّ ٱزْدَادُوا۟ كُفْرًا لَّن تُقْبَلَ تَوْبَتُهُمْ وَأُو۟لَـٰٓئِكَ هُمُ ٱلضَّآلُّونَ

Indeed, those who disbelieve [i.e., reject the message] after their belief and then increase in disbelief - never will their [claimed] repentance be accepted, and they are the ones astray.

Translation: Saheeh International

Tafsir

The following was revealed regarding the Jews Surely those who disbelieve in Jesus after they have believed in Moses and then increase in unbelief in Muhammad (s) — their repentance shall not be accepted when they are drawing their last gasps of life or when they have died as disbelievers; …

Excerpt from Tafsir al-Jalalayn, commentary on 3:90, via Quran.com. The reader has the full commentary and 9 more tafsirs.