Surah An-Nisa, ayah 135

۞ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ كُونُواْ قَوَّٰمِينَ بِٱلۡقِسۡطِ شُهَدَآءَ لِلَّهِ وَلَوۡ عَلَىٰٓ أَنفُسِكُمۡ أَوِ ٱلۡوَٰلِدَيۡنِ وَٱلۡأَقۡرَبِينَۚ إِن يَكُنۡ غَنِيًّا أَوۡ فَقِيرٗا فَٱللَّهُ أَوۡلَىٰ بِهِمَاۖ فَلَا تَتَّبِعُواْ ٱلۡهَوَىٰٓ أَن تَعۡدِلُواْۚ وَإِن تَلۡوُۥٓاْ أَوۡ تُعۡرِضُواْ فَإِنَّ ٱللَّهَ كَانَ بِمَا تَعۡمَلُونَ خَبِيرٗا ١٣٥

Yā'ayyuhal-ladhīna āmanū kūnū qawwāmīna bil-qisti shuhadā'a lillāhi walaw 'alā anfusikum awil-wālidayni wal-aqrabīna in yakun ghaniyyan aw faqīran fallāhu awlā bihimā falā tattabi'ul-hawā an ta'dilū wa in talwū aw tu'ridū fa innallāha kāna bimā ta'malūna khabīrā

O you who have believed, be persistently standing firm in justice, witnesses for Allāh, even if it be against yourselves or parents and relatives. Whether one is rich or poor, Allāh is more worthy of both.²²³ So follow not [personal] inclination, lest you not be just. And if you distort [your testimony] or refuse [to give it], then indeed Allāh is ever, of what you do, Aware.