In Islamic jurisprudence and law, right possession comes from trades such as Ijara, Jualla, Sulh, Hiba, and Irth and etc. accordingly, if someone gives money to others to judge in his favor, or expects grantee to express something wrong as a right, or unlawfully prefer endower to the others, has done something wrong that is not a right reason of possession. Stating the difference between bribe and gift in this essay and the fact that some claimed gifts are bribe in nature, we will review the arguments of prohibition of bribery, invoking Quran and tradition of Prophet and Imams with studying an early Islam case.