Surah Al-Furqan 25:6

قُلْ أَنزَلَهُ ٱلَّذِى يَعْلَمُ ٱلسِّرَّ فِى ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۚ إِنَّهُۥ كَانَ غَفُورًا رَّحِيمًا

Say, [O Muḥammad], "It has been revealed by He who knows [every] secret within the heavens and the earth. Indeed, He is ever Forgiving and Merciful."

Translation: Saheeh International

Tafsir

Say ‘It has been revealed by Him Who knows the secret the Unseen of the heavens and the earth. Truly He is ever Forgiving of believers Merciful’ to them.

Excerpt from Tafsir al-Jalalayn, commentary on 25:6, via Quran.com. The reader has the full commentary and 9 more tafsirs.