Hadith #3600 (Sunan Abi Dawud)
Book: The Office of the Judge (Kitab Al-Aqdiyah)
Narrator(s): Muhammad bin Khlf al-Hdady محمد بن خلف الحدادي أبو بكر البغدادي, Sa'id bin 'Abdul 'Aziz al-Tanuqi سعيد بن عبد العزيز التنوخي, Sulaiman bin Musa al-Ashdaq سليمان بن موسى الأموي الأشدق, Zayd bin Yahya bin 'Ubaid زيد بن يحيى بن عبيد
Grade: Hasan

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.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-3600/