"O you who believed, be persistently standing firm in justice, witnesses for Allah, even if it be against yourselves or parents and relatives. whether one is rich or poor, Allah is more worthy of both. So follow not [personal] inclination ,lest you not be just. And if you distort your testimony or refuse to give it ,then indeed Allah is ever , with what you do , acquainted."
Al Quran Juz 5--135