Concise Quran Commentary
And your Lord knows what their chests hide and make apparent. Nothing of this is hidden from Him and He shall reward them for it.
وَرَبُّكَ يَعْلَمُ مَا تُكِنُّ صُدُورُهُمْ وَمَا يُعْلِنُونَ
Your Lord knows all that their hearts conceal and all that they reveal.
And your Lord knows what their chests hide and make apparent. Nothing of this is hidden from Him and He shall reward them for it.