Surah Ar-Rum 30:44

مَن كَفَرَ فَعَلَيْهِ كُفْرُهُۥ ۖ وَمَنْ عَمِلَ صَـٰلِحًا فَلِأَنفُسِهِمْ يَمْهَدُونَ

Whoever disbelieves - upon him is [the consequence of] his disbelief. And whoever does righteousness - they are for themselves preparing,

Translation: Saheeh International

Tafsir

Whoever disbelieves the consequence of his disbelief shall upon him that is the evil consequences of his disbelief which will be his being punished in the Fire and those who act righteously they will be paving the way for the salvation of their own souls preparing their places in Paradise

Excerpt from Tafsir al-Jalalayn, commentary on 30:44, via Quran.com. The reader has the full commentary and 9 more tafsirs.