General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 4774
Narrated Aisha, Ummul Mu'minin:
A man asked permission to see the Prophet (peace_be_upon_him), and the Prophet (peace_be_upon_him) said: He is a bad member of the tribe. When he entered, the Apostle of Allah (peace_be_upon_him) treated in a frank and friendly way and spoke to him. When he departed , I said: Apostle of Allah! When he asked permission, you said: He is a bad member of the tribe, but when he entered, you treated him in a frank and friendly way. The Apostle of Allah replied: Aisha! Allah does not like the one who is unseemly and lewd in his language.