Sahih Muslim | Book 5 | Hadith Number 2258

Narrated by Mu'awiya
Mu'awiya reported Allah's Messenger (may prom be upon him) as saying: Do not beg importunately, for, I swear by Allah, none of you who asks me for anything and manages to get what he asks for when I disapprove td it will he be blessed in that which I give him.