Asad’s version

29:52 Say [unto those who will not believe]: "God is witness enough between me and you! He knows all that is in the heavens and on earth; and they who are bent on believing in what is false and vain, and thus on denying God - it is they, they who shall be the losers!"

The Quranic text and Ali’s version

قُلْ كَفَى بِاللَّهِ بَيْنِي وَبَيْنَكُمْ شَهِيدًا...

29:52 Say: "Enough is Allah for a Witness between me and you:

...يَعْلَمُ مَا فِي السَّمَاوَاتِ وَالْأَرْضِ...

He knows what is in the heavens and on earth.

C3483. The test of a Revelation is whether it comes from Allah or not. This is made clear by the life and teachings of the Messenger who brings it.

No fraud or falsehood can for a moment stand before Allah. All the most hidden things in heaven and earth are open before Him.

...وَالَّذِينَ آمَنُوا بِالْبَاطِلِ وَكَفَرُوا بِاللَّهِ أُوْلَئِكَ هُمُ الْخَاسِرُونَ ﴿٥٢﴾

And it is those who believe in vanities and reject Allah, that will perish (in the end)."

C3484. If Truth is rejected, Truth does not suffer. It is the rejecters who suffer and perish in the end.