'Amr bin Shu'aib on his father's authority told that his grandfather said:

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.

حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، حَدَّثَنَا مُحَمَّدُ بْنُ رَاشِدٍ، حَدَّثَنَا سُلَيْمَانُ بْنُ مُوسَى، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ ﷺ رَدَّ شَهَادَةَ الْخَائِنِ وَالْخَائِنَةِ وَذِي الْغِمْرِ عَلَى أَخِيهِ وَرَدَّ شَهَادَةَ الْقَانِعِ لأَهْلِ الْبَيْتِ وَأَجَازَهَا لِغَيْرِهِمْ . قَالَ أَبُو دَاوُدَ الْغِمْرُ الْحِنَةُ وَالشَّحْنَاءُ وَالْقَانِعُ الأَجِيرُ التَّابِعُ مِثْلُ الأَجِيرِ الْخَاصِّ .