Surah Sad 38:54

إِنَّ هَـٰذَا لَرِزْقُنَا مَا لَهُۥ مِن نَّفَادٍ

Indeed, this is Our provision; for it there is no depletion.

Translation: Saheeh International

Tafsir

This is indeed Our provision which will never be exhausted’ in other words one which will never cease this last sentence mā lahu min nafādin is a circumstantial qualifier referring to rizqunā ‘Our provision’; or it is a second predicate of inna ‘indeed’ meaning that it will be ‘everlasting’.

Excerpt from Tafsir al-Jalalayn, commentary on 38:54, via Quran.com. The reader has the full commentary and 9 more tafsirs.