Surah Al-Hijr 15:9

إِنَّا نَحْنُ نَزَّلْنَا ٱلذِّكْرَ وَإِنَّا لَهُۥ لَحَـٰفِظُونَ

Indeed, it is We who sent down the message [i.e., the Qur’ān], and indeed, We will be its guardian.

Translation: Saheeh International

Tafsir

Verily it is We nahnu emphasises the subject of inna or functions as a separating pronoun Who have revealed the Remembrance the Qur’ān and assuredly We will preserve it against substitution distortion additions and omissions.

Excerpt from Tafsir al-Jalalayn, commentary on 15:9, via Quran.com. The reader has the full commentary and 9 more tafsirs.