General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 5208
Narrated Imran ibn Husayn:
In the pre-Islamic period we used to say: "May Allah make the eye happy for you," and "Good morning" but when Islam came, we were forbidden to say that. AbdurRazzaq said on the authority of Ma'mar: It is disapproved that a man should say: "May Allah make the eye happy for you," but there is no harm in saying: "May Allah make your eye happy.