Hadith
حَدَّثَنَا أَحْمَدُ بْنُ صَالِحٍ، حَدَّثَنَا ابْنُ وَهْبٍ، حَدَّثَنَا عَمْرٌو، عَنِ ابْنِ أَبِي هِلاَلٍ، أَنَّ أَبَا الرِّجَالِ، مُحَمَّدَ بْنَ عَبْدِ الرَّحْمَنِ حَدَّثَهُ عَنْ أُمِّهِ، عَمْرَةَ بِنْتِ عَبْدِ الرَّحْمَنِ وَكَانَتْ فِي حَجْرِ عَائِشَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم عَنْ عَائِشَةَ أَنَّ النَّبِيَّ صلى الله عليه وسلم بَعَثَ رَجُلاً عَلَى سَرِيَّةٍ، وَكَانَ يَقْرَأُ لأَصْحَابِهِ فِي صَلاَتِهِ فَيَخْتِمُ بِ ـ {قُلْ هُوَ اللَّهُ أَحَدٌ} فَلَمَّا رَجَعُوا ذَكَرُوا ذَلِكَ لِلنَّبِيِّ صلى الله عليه وسلم فَقَالَ " سَلُوهُ لأَىِّ شَىْءٍ يَصْنَعُ ذَلِكَ ". فَسَأَلُوهُ فَقَالَ لأَنَّهَا صِفَةُ الرَّحْمَنِ، وَأَنَا أُحِبُّ أَنْ أَقْرَأَ بِهَا. فَقَالَ النَّبِيُّ صلى الله عليه وسلم " أَخْبِرُوهُ أَنَّ اللَّهَ يُحِبُّهُ ".
Narrated `Aisha:The Prophet (ﷺ) sent (an army unit) under the command of a man who used to lead his companions in the prayers and would finish his recitation with (the Sura 112): 'Say (O Muhammad): "He is Allah, the One." ' (112.1) When they returned (from the battle), they mentioned that to the Prophet. He said (to them), "Ask him why he does so." They asked him and he said, "I do so because it mentions the qualities of the Beneficent and I love to recite it (in my prayer)." The Prophet; said (to them), "Tell him that Allah loves him
Sahih
Sahih al-Bukhari 7375 ·Book 97, Hadith 5·Also available on sunnah.com·