53:30

ذَٰلِكَ مَبْلَغُهُم مِّنَ الْعِلْمِ إِنَّ رَبَّكَ هُوَ أَعْلَمُ بِمَن ضَلَّ عَن سَبِيلِهِ وَهُوَ أَعْلَمُ بِمَنِ اهْتَدَىٰ

Transliteration:

Thalika mablaghuhum mina alAAilmi inna rabbaka huwa aAAlamu biman dalla AAan sabeelihi wahuwa aAAlamu bimani ihtada

Word by Word:

That (is) their sum of knowledge. Indeed, your Lord (is) He (Who) knows best (he) who strays from His Path, and He knows best (he) who is guided.

Translations:

which, to them, is the only thing worth knowing. Behold, thy Sustainer is fully aware as to who has strayed from His path, and fully aware is He as to who follows His guidance.

That is as far as knowledge will reach them. Verily thy Lord knoweth best those who stray from His Path, and He knoweth best those who receive guidance.

Such is their sum of knowledge. Lo! thy Lord is Best Aware of him who strayeth, and He is Best Aware of him whom goeth right.

And they have no knowledge of it. They follow but conjecture, and surely conjecture avails naught against Truth.

That is their sum of knowledge. Indeed, your Lord is most knowing of who strays from His way, and He is most knowing of who is guided.