Surah Ad-Dukhan 44:2
وَٱلْكِتَـٰبِ ٱلْمُبِينِ
By the clear Book,
Translation: Saheeh International
Tafsir
By the Book the Qur’ān that clarifies the one that distinguishes what is lawful from what is unlawful.
Excerpt from Tafsir al-Jalalayn, commentary on 44:2, via Quran.com. The reader has the full commentary and 9 more tafsirs.