Sahih Muslim 2567 a
Abu Huraira reported Allah's Apostle (ﷺ) as saying:
A person visited his brother in another town and Allah deputed an Angel to wait for him on his way and when he came to him he said: Where do you intend to go? He said: I intend to go to my brother in this town. He said: Have you done any favour to him (the repayment of which you intend to get)? He said: No, excepting this that I love Mm for the sake of Allah, the Exalted and Glorious. Thereupon he said: I am a meesenger to you from, Allah: (to inform you) that Allah loves you as you love him (for His sake).
حَدَّثَنِي عَبْدُ الأَعْلَى بْنُ حَمَّادٍ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ ثَابِتٍ، عَنْ أَبِي رَافِعٍ،
 عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم ‏
"‏ أَنَّ رَجُلاً زَارَ أَخًا لَهُ فِي قَرْيَةٍ أُخْرَى
 فَأَرْصَدَ اللَّهُ لَهُ عَلَى مَدْرَجَتِهِ مَلَكًا فَلَمَّا أَتَى عَلَيْهِ قَالَ أَيْنَ تُرِيدُ قَالَ أُرِيدُ أَخًا لِي فِي هَذِهِ
 الْقَرْيَةِ ‏.‏ قَالَ هَلْ لَكَ عَلَيْهِ مِنْ نِعْمَةٍ تَرُبُّهَا قَالَ لاَ غَيْرَ أَنِّي أَحْبَبْتُهُ فِي اللَّهِ عَزَّ وَجَلَّ ‏.‏
 قَالَ فَإِنِّي رَسُولُ اللَّهِ إِلَيْكَ بِأَنَّ اللَّهَ قَدْ أَحَبَّكَ كَمَا أَحْبَبْتَهُ فِيهِ ‏"‏ ‏.‏