Sahih Muslim Book 45, Hadith 46
Verily. Allah would say on the Day of Resurrection: Where are those who have mutual love for My Glory's sake? Today I shall shelter them in My shadow when there is no other shadow but the shadow of Mine.
Leave them and put them off until they are turned to reconciliation.
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).