'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 صلى الله عليه وسلم 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 ‏.‏