Quran 4, An-Nisa (the Women) ⓘ

4:135O ye who believe! Be ye staunch in justice, witnesses for Allah, even though it be against yourselves or (your) parents or (your) kindred, whether (the case be of) a rich man or a poor man, for Allah is nearer unto both (them ye are). So follow not passion lest ye lapse (from truth) and if ye lapse or fall away, then lo! Allah is ever Informed of what ye do.

يَا أَيُّهَا الَّذِينَ آمَنُوا كُونُوا قَوَّامِينَ بِالْقِسْطِ شُهَدَاءَ لِلَّهِ وَلَوْ عَلَى أَنْفُسِكُمْ أَوِ الْوَالِدَيْنِ وَالْأَقْرَبِينَ إِنْ يَكُنْ غَنِيًّا أَوْ فَقِيرًا فَاللَّهُ أَوْلَى بِهِمَا فَلَا تَتَّبِعُوا الْهَوَى أَنْ تَعْدِلُوا وَإِنْ تَلْوُوا أَوْ تُعْرِضُوا فَإِنَّ اللَّهَ كَانَ بِمَا تَعْمَلُونَ خَبِيرًا