Surah Al-'Ankabut 29:52

قُلْ كَفَىٰ بِٱللَّهِ بَيْنِى وَبَيْنَكُمْ شَهِيدًا ۖ يَعْلَمُ مَا فِى ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۗ وَٱلَّذِينَ ءَامَنُوا۟ بِٱلْبَـٰطِلِ وَكَفَرُوا۟ بِٱللَّهِ أُو۟لَـٰٓئِكَ هُمُ ٱلْخَـٰسِرُونَ

Say, "Sufficient is Allāh between me and you as Witness. He knows what is in the heavens and earth. And they who have believed in falsehood and disbelieved in Allāh - it is those who are the losers."

Translation: Saheeh International

Tafsir

Say ‘God suffices as a witness between me and you’ of my sincerity. He knows whatever is in the heavens and the earth including my circumstances and yours. And those who believe in falsehood namely all that is worshipped besides God and who disbelieve in God from among you — those they are the losers in their bargain …

Excerpt from Tafsir al-Jalalayn, commentary on 29:52, via Quran.com. The reader has the full commentary and 9 more tafsirs.