It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever loves a man for the sake of Allah has loved Allah; so they will both enter Paradise together, and the one who loved for the sake of Allah will be of a higher rank than the other."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13652