Riyad as-Salihin 388
The Book of Miscellany
Signs of Allah's love for His slaves and the efforts for its Achievement
'Aishah (May Allah be pleased with her) reported: Messenger of Allah, (ﷺ) appointed a man in charge of an army unit who led them in Salat (prayer); he always concluded his recitation with Surat Al-Ikhlas: "Say (O Muhammad (ﷺ)): 'He is Allah, (the) One. Allah-us-Samad (Allah - the Self-Sufficient). He begets not, nor was He begotten. And there is none equal or comparable to Him."' (112:1-4) Upon their return to Al-Madinah, they mentioned this to Messenger of Allah (ﷺ), who said, "Ask him why he does so?" He was asked and he said, "This Surah contains the Attributes of Allah, the Gracious, and I love to recite it. Messenger of Allah (ﷺ) then told them, "Tell him that Allah loves him". [Al-Bukhari and Muslim].