وَعَنْ عَبْدِ اَللَّهِ بْنِ عَمْرٍو رَضِيَ اَللَّهُ عَنْهُمَا
قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«لَا تَجُوزُ شَهَادَةُ خَائِنٍ، وَلَا خَائِنَةٍ، وَلَا ذِي غِمْرٍ عَلَى أَخِيهِ، وَلَا تَجُوزُ شَهَادَةُ اَلْقَانِعِ لِأَهْلِ اَلْبَيْتِ»
The Messenger of Allah (sallallahu alayhi wa sallam) said: “It is not permissible to accept the testimony of a man or a woman who does not fulfill their trusts, or of one who harbors a grudge against his brother, or the testimony of one who is dependent on a family (to testify) for members of the family.”.
Bulugh al-Maram 1598, Book 14, Judgments, Hadith 20. 1 min read