Surah An-Nahl 16:39

لِيُبَيِّنَ لَهُمُ ٱلَّذِى يَخْتَلِفُونَ فِيهِ وَلِيَعْلَمَ ٱلَّذِينَ كَفَرُوٓا۟ أَنَّهُمْ كَانُوا۟ كَـٰذِبِينَ

[It is] so He will make clear to them [the truth of] that wherein they differ and so those who have disbelieved may know that they were liars.

Translation: Saheeh International

Tafsir

That He may make clear to them li-yubayyina is semantically connected to an implied yab‘athuhum ‘He will resurrect them’ what they differ with believers in of matters of religion by punishing them and rewarding the believers and that the disbelievers may know that they were liars when they denied the Resurrection.

Excerpt from Tafsir al-Jalalayn, commentary on 16:39, via Quran.com. The reader has the full commentary and 9 more tafsirs.