Surah Al-A'la 87:18
إِنَّ هَـٰذَا لَفِى ٱلصُّحُفِ ٱلْأُولَىٰ
Indeed, this is in the former scriptures,
Translation: Saheeh International
Tafsir
Truly this the success of those who purify themselves and the Hereafter being better is in the former scrolls the ones revealed before the Qur’ān
Excerpt from Tafsir al-Jalalayn, commentary on 87:18, via Quran.com. The reader has the full commentary and 9 more tafsirs.