Reference
ID 3536
Collector Muslim ibn al-Hajjaj
Book Sahih Muslim
Chapter The Book of Prayer (Travellers)
Reference (English Book) Book 4, Hadith 1773
Reference (Arabic Book) Book 7, Hadith 1925
Hadith Type Khabar
Matn (English)

'A'isha reported: The Messenger of Allah (may peace be upon him) sent a man in charge of an expedition and he would recite for his Companions during their prayer, ending (recitation) with:" Say, He is God, One." When they returned mention was made of it to the Messenger of Allah (may peace be upon him). He (the Holy Prophet) told them to ask him why he had done like that. So they asked him and he said: Verily, it is an attribute of the Compassionate One, and (for this reason) I love to recite it. The Messenger of Allah (may peace be upon him) thereupon said: Inform him that Allah loves him.

Matn (Arabic)

وَحَدَّثَنَا وَاصِلُ بْنُ عَبْدِ الأَعْلَى، حَدَّثَنَا ابْنُ فُضَيْلٍ، عَنْ بَشِيرٍ أَبِي إِسْمَاعِيلَ، عَنْ أَبِي حَازِمٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ خَرَجَ إِلَيْنَا رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏"‏ أَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ ‏"‏ ‏.‏ فَقَرَأَ ‏{‏ قُلْ هُوَ اللَّهُ أَحَدٌ * اللَّهُ الصَّمَدُ‏}‏ حَتَّى خَتَمَهَا ‏.‏