Surah An-Nisa 4:39

وَمَاذَا عَلَيْهِمْ لَوْ ءَامَنُوا۟ بِٱللَّهِ وَٱلْيَوْمِ ٱلْـَٔاخِرِ وَأَنفَقُوا۟ مِمَّا رَزَقَهُمُ ٱللَّهُ ۚ وَكَانَ ٱللَّهُ بِهِمْ عَلِيمًا

And what [harm would come] upon them if they believed in Allāh and the Last Day and spent out of what Allāh provided for them? And Allāh is ever, about them, Knowing.

Translation: Saheeh International

Tafsir

And what burden is on them if they were to believe in God and the Last Day and expend of what God has provided them? that is to say what harm would this cause them? In other words there is no harm therein. Rather harm lies in what they follow the interrogative is meant as a disavowal; …

Excerpt from Tafsir al-Jalalayn, commentary on 4:39, via Quran.com. The reader has the full commentary and 9 more tafsirs.