Cheating and Bribery

وَلَا تَأْكُلُوا أَمْوَالَكُم بَيْنَكُم بِالْبَاطِلِ وَتُدْلُوا بِهَا إِلَى الْحُكَّامِ لِتَأْكُلُوا فَرِيقًا مِّنْ أَمْوَالِ النَّاسِ بِالْإِثْمِ وَأَنتُمْ تَعْلَمُونَ

(Al-Baqarah:188)
And do not consume one another's wealth by false means, nor offer it as bribes to the judges in order to consume part of other people's wealth illicitly, while you know.