Surah Al-Muminoon, Verse 100
لَعَلِّىٓ أَعْمَلُ صَٰلِحًۭا فِيمَا تَرَكْتُ ۚ كَلَّآ ۚ إِنَّهَا كَلِمَةٌ هُوَ قَآئِلُهَا ۖ وَمِن وَرَآئِهِم بَرْزَخٌ إِلَىٰ يَوْمِ يُبْعَثُونَ
Translation — Sahih International
That I might do righteousness in that which I left behind." No! It is only a word he is saying; and behind them is a barrier until the Day they are resurrected.
Source
Kur'an-ı Kerim, Mü'minûn Suresi 23:100
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/23-suresi-100-ayet