It is narrated from Muhammad, may Allah have mercy on him, that a person presented witnesses against another. His opponent said: "I prefer his oath more than his testimony." Then he was asked to swear an oath, but he refused. Hazrat Shurayh said: "The praise you have given to your testimony is very bad, and their testimony is rejected." Hazrat Abdullah bin Utbah said: "I will not give you the right for which you will not take an oath."