Abu Ad-Darda (may Allah be pleased with him) narrated that :

the Prophet ﷺ said: “Should I not inform you of the best of your deed, and the purest of them with your Master, and the highest of them in your ranks, and what is better for you than spending gold and silver, and better for you than meeting your enemy and striking their necks, and they strike your necks?” They said: “Of course.” He said, “The remembrance of Allah [Most High].” [Then] Mu’adh bin Jabal (may Allah be pleased with him) said: “There is nothing that brings more salvation from the punishment of Allah than the remembrance of Allah.”

حَدَّثَنَا الْحُسَيْنُ بْنُ حُرَيْثٍ، حَدَّثَنَا الْفَضْلُ بْنُ مُوسَى، عَنْ عَبْدِ اللَّهِ بْنِ سَعِيدٍ، هُوَ ابْنُ أَبِي هِنْدٍ عَنْ زِيَادٍ، مَوْلَى ابْنِ عَيَّاشٍ عَنْ أَبِي بَحْرِيَّةَ، عَنْ أَبِي الدَّرْدَاءِ، رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ النَّبِيُّ ﷺ " أَلاَ أُنَبِّئُكُمْ بِخَيْرِ أَعْمَالِكُمْ وَأَزْكَاهَا عِنْدَ مَلِيكِكُمْ وَأَرْفَعِهَا فِي دَرَجَاتِكُمْ وَخَيْرٌ لَكُمْ مِنْ إِنْفَاقِ الذَّهَبِ وَالْوَرِقِ وَخَيْرٌ لَكُمْ مِنْ أَنْ تَلْقَوْا عَدُوَّكُمْ فَتَضْرِبُوا أَعْنَاقَهُمْ وَيَضْرِبُوا أَعْنَاقَكُمْ " . قَالُوا بَلَى . قَالَ " ذِكْرُ اللَّهِ تَعَالَى " . فَقَالَ مُعَاذُ بْنُ جَبَلٍ رضى الله عنه مَا شَيْءٌ أَنْجَى مِنْ عَذَابِ اللَّهِ مِنْ ذِكْرِ اللَّهِ .

قَالَ أَبُو عِيسَى وَقَدْ رَوَى بَعْضُهُمْ هَذَا الْحَدِيثَ عَنْ عَبْدِ اللَّهِ بْنِ سَعِيدٍ مِثْلَ هَذَا بِهَذَا الإِسْنَادِ وَرَوَى بَعْضُهُمْ عَنْهُ فَأَرْسَلَهُ .