حَدَّثَنَا أَبُو الْوَلِيدِ الطَّيَالِسِيُّ، حَدَّثَنَا سُلَيْمَانُ بْنُ كَثِيرٍ، حَدَّثَنَا الزُّهْرِيُّ، عَنْ عَطَاءِ بْنِ يَزِيدَ، عَنْ أَبِي سَعِيدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ سُئِلَ أَىُّ الْمُؤْمِنِينَ أَكْمَلُ إِيمَانًا قَالَ ‏"‏ رَجُلٌ يُجَاهِدُ فِي سَبِيلِ اللَّهِ بِنَفْسِهِ وَمَالِهِ وَرَجُلٌ يَعْبُدُ اللَّهَ فِي شِعْبٍ مِنَ الشِّعَابِ قَدْ كُفِيَ النَّاسُ شَرَّهُ ‏"‏ ‏.‏

Abu Sa’id (Al Khudri) reported The Prophet(PBUH) was asked “Which believers are most perfect in respect of faith? He replied “A man who strives in the path of Allaah with his life and property and a man who worships Allaah in a mountain valley where he protects the people from his evil.”” Translation Not Available

Book reference: Sunan Abi Dawud Book 15 Hadith 2485
Web reference: Sunan Abi Dawud Book 14 Hadith 2479