Sahih Al Bukhari Hadith Number 2401

Narrated Abu Huraira: A man came to the Prophet (peace be upon him) and demanded his debts and used harsh words. The companions of the Prophet wanted to harm him, but the Prophet (peace be upon him) said, “Leave him, as the creditor (owner of the right) has the right to speak.”

43  Loans, Payment of Loans, Freezing of Property, Bankruptcy
Hadith number 2401
Volume no 3
Chapter: 13 (The owner of the right has the permission to demand his right)