The Mosaic covenant (named after Moses), also known as the Sinaitic covenant (after the biblical Mount Sinai), refers to a covenant between God and the Israelites, including their proselytes, not limited to the ten commandments, nor the event when they were given, but including the entirety of laws that Moses delivered from God in the five books of Torah. Historical criticism The concept of a covenant began long before the biblical era, specifically the beginnings of Israel. According to George E. Mendenhall, covenants were originally established as legal customs and then later were replicated in the field of religion. These covenants were created on the basis of an oath, a promise between two parties followed by performance. Engaging in an oath implied that the more powerful party would ensure that the other received proper punishment if it were to default. In the case of religion, the god(s) would be carrying out punishment. Such covenants assured that either blessings or curses be enacted in response to the circumstances. The covenant of the pieces between God and Abraham follows the form of the suzerain covenant; what is significant is that Israel has no duties to uphold; the covenant is not conditional. Future covenants between Israel and God would be conditional. This is clearly expressed in , recited twice-daily as part of the foundational prayer, the Shema. This passage declares that as long as Israel is faithful to God it will be blessed with ample crops but should it follow other gods the land will not support it. The cost of not following this covenant is hard. Mendenhall also addresses the theory behind blood ties and their significance to the concept of a covenant. As stated in the Bible, Abraham, Isaac and Jacob are the ancestors of Israel and because of their shared blood, they consequently form a bond. This blood tie is compared to the tie that is established by a covenant, and implies that without their shared blood, covenants would be the only way to ensure such unification of a religious group.