Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Prophet Muhammad (peace and blessings be upon him) said: "A man set out to visit his brother in another town. Allah Almighty appointed an angel on his way. When the man came to the angel, the angel asked: 'Where are you going?' He replied: 'I am going to visit my brother in this town.' The angel asked: 'Has he done any favor to you which you are repaying?' The man replied: 'No! I love him for the sake of Allah Almighty.' The angel said: 'I am a messenger to you from Allah Almighty. Allah loves you as you love this person for the sake of Allah Almighty.'"