Mishkat al-Masabih #3621

‘Amr b. Shu'aib, on his father’s authority, told that his grandfather reported the Prophet as saying, “The testimony of a deceitful man or woman, or of an immoral man or woman, or of one who harbours rancour against his brother is not allowable," and he rejected the testimony of one who is dependent on a family. Abu Dawud transmitted it.