General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 4824
Narrated Aisha, Ummul Mu'minin:
Maymun ibn AbuShabib said: A beggar passed by Aisha and gave him a piece of bread. Another man who wore clothes and had good appearance passed by her, and she made her seated and he ate (with her). When she was asked about that, she replied: The Apostle of Allah (peace_be_upon_him) said: treat the people according to their ranks.