وَمَن
كَفَرَ
فَلَا
يَحۡزُنكَ
كُفۡرُهُۥٓۚ
إِلَيۡنَا
مَرۡجِعُهُمۡ
فَنُنَبِّئُهُم
بِمَا
عَمِلُوٓاْۚ
إِنَّ
ٱللَّهَ
عَلِيمُۢ
بِذَاتِ
ٱلصُّدُورِ
٢٣
また（使徒*よ）、不信仰に陥った者*がいても、その不信仰があなた[1]を悲しませるようなことがあってはならない。（復活の日*、）われら*にこそ彼らの帰り所はあり、われら*は彼らに自分たちが行ったことを告げ聞かせ（、それに報いを与え）るのだから。本当にアッラー*は、胸中をご存知になるお方なのである。 1
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Ibn Kathir (Abridged)
وَهُوَ مُحْسِنٌ
(while he is a Muhsin) i.e., doing what his Lord has commanded and abstaining from what He has forbidden,
فَقَدِ اسْتَمْسَكَ بِالْعُرْوَةِ الْوُثْقَى
(then he has grasped the most trustworthy handhold.) means, he has received a firm promise from Allah that He will not punish him.
وَإِلَى
…وَهُوَ مُحْسِنٌ
(while he is a Muhsin) i.e., doing what his Lord has commanded and abstaining from what He has forbidden,
فَقَدِ اسْتَمْسَكَ بِالْعُرْوَ
…