Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:28:69 –

And your Lord knows what their breasts conceal and what they declare.  

And your Lord knows what their breasts conceal, ˹what˺ their hearts keep secret of disbelief and otherwise, and what they proclaim, by their tongues of such things.
القرآن:٢٨:٦٩ –

وَرَبُّكَ يَعْلَمُ مَا تُكِنُّ صُدُورُهُمْ وَمَا يُعْلِنُونَ  

{وربك يعلم ما تكن صدورهم} تُسِرُّ قلوبهم من الكفر وغيره. {وما يعلنون} بألسنتهم من ذلك.

See similar narrations below:

Collected by Qurʾān
quran:27:74 –

And indeed, your Lord knows what their breasts conceal and what they declare.  

And surely your Lord knows what their hearts conceal, ˹what these˺ hide, and what they proclaim, by their tongues.
القرآن:٢٧:٧٤ –

وَإِنَّ رَبَّكَ لَيَعْلَمُ مَا تُكِنُّ صُدُورُهُمْ وَمَا يُعْلِنُونَ  

{وإن ربك ليعلم ما تكن صدورهم} تخفيه {وما يعلنون} بألسنتهم.