It is narrated from Sayyiduna Salman al-Farisi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "There is no Muslim who performs ablution and performs it well except that he is a visitor of Allah, the Mighty and Majestic, and it is a duty upon the one who is visited to honour his visitor."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6120