The Messenger of Allah ﷺ rejected the testimony of a deceitful man and woman, of one who harbours rancour against his brother, and he rejected the testimony of one who is dependent on a family, and he allowed his testimony for other. Abu Dawud said: Ghimr means malice and enimity ; qani (dependant), a subordinate servant like a special servant.  

أَنَّ رَسُولَ اللَّهِ ﷺ رَدَّ شَهَادَةَ الْخَائِنِ وَالْخَائِنَةِ وَذِي الْغِمْرِ عَلَى أَخِيهِ وَرَدَّ شَهَادَةَ الْقَانِعِ لأَهْلِ الْبَيْتِ وَأَجَازَهَا لِغَيْرِهِمْ  

The Messenger of Allah ﷺ said: The testimony of a deceitful man or woman, of an adulterer and adulteress, and of one who harbours rancour against his brother is not allowable.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ تَجُوزُ شَهَادَةُ خَائِنٍ وَلاَ خَائِنَةٍ وَلاَ زَانٍ وَلاَ زَانِيَةٍ وَلاَ ذِي غِمْرٍ عَلَى أَخِيهِ