Shahr bin Hawshab (may Allah have mercy on him) narrates from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When the honoured man of a people comes to you, honour him."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17338