Surah At-Tariq 86:4

إِن كُلُّ نَفْسٍ لَّمَّا عَلَيْهَا حَافِظٌ

There is no soul but that it has over it a protector.

Translation: Saheeh International

Tafsir

Over every soul there is a keeper if read la-mā then mā is extra and in is softened in place of the hardened form with its subject omitted that is to say innahu; the lām is a particle for separation; …

Excerpt from Tafsir al-Jalalayn, commentary on 86:4, via Quran.com. The reader has the full commentary and 9 more tafsirs.