Allah said;

﴿وَإِذَا قُلْتُمْ فَاعْدِلُواْ وَلَوْ كَانَ ذَا قُرْبَى﴾

(And whenever you give your word, say the truth even if a near relative is concerned.) This is similar to His statement,

﴿يَـأَيُّهَآ الَّذِينَ ءَامَنُواْ كُونُواْ قَوَّامِينَ للَّهِ شُهَدَآءَ بِالْقِسْطِ﴾

(O you who believe! Stand out firmly for Allah as just witnesses.) ﴿5:8﴾ And there is a similar Ayah in Surat An-Nisa'. So Allah commands justice in action and statement, with both near relatives and distant relatives. Indeed, Allah orders justice for everyone at all times and in all situations.