135يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ كُونُوا۟ قَوَّٰمِينَ بِٱلْقِسْطِ شُهَدَآءَ لِلَّهِ وَلَوْ عَلَىٰٓ أَنفُسِكُمْ أَوِ ٱلْوَٰلِدَيْنِ وَٱلْأَقْرَبِينَ ۚ إِن يَكُنْ غَنِيًّا أَوْ فَقِيرًا فَٱللَّهُ أَوْلَىٰ بِهِمَا ۖ فَلَا تَتَّبِعُوا۟ ٱلْهَوَىٰٓ أَن تَعْدِلُوا۟ ۚ وَإِن تَلْوُۥٓا۟ أَوْ تُعْرِضُوا۟ فَإِنَّ ٱللَّهَ كَانَ بِمَا تَعْمَلُونَ خَبِيرًا
[135] O Believers, be you the standard-bearers of justice and witnesses for the sake of Allah,164 even165 though your justice and your evidence might be harmful to yourselves, or to your parents, or to your relatives. It does not matter whether the party concerned is rich or poor: Allah is their greater well-wisher than you; therefore, do not follow your own desire lest you should deviate from doing justice. If you distort your evidence or refrain from the truth, know it well that Allah is fully aware of what you do.
164The words, " .....be you the standard-bearers of justice", are very significant. They imply, "You not only have to do justice but have also to bear the standard of justice in order to eradicate injustice and establish right and justice in its place. As Believers, you have to gird up your loins to support justice, whenever your support is needed."
165That is, "The sole aim of your testimony should be to please Allah, without any tinge of partiality, self-interest, fear or favor in it."