Abu Dawud
The Office Of The Judge
Book Number: 018 / Hadith Number: 3621
Narated By Ash-Sharid : The Prophet (pbuh) said: Delay in payment on the part of one who possesses means makes it lawful to dishonour and punish him. Ibn al-Mubarak said that "dishonour" means that he may be spoken to roughly and "punish" means he may be imprisoned for it.