The opening chapters of Genesis are, of course, only the beginning of the biblical story. And just as there are passages which can be cited in support of a Christian vegetarianism or veganism, so there are passages which suggest that eating animals is morally permissible. The most problematic passages for Christian vegetarians are those which include an explicit permission to eat animals. Genesis 9:3–4 is the first such example. In this verse, God tells Noah and his family that animals will now be their food, although they are not to eat animal flesh which contains blood.[] This new situation – that of humans eating animals – is then taken largely for granted in much of the biblical narrative. records God giving the Israelites rules about what types of meat may be eaten, which implies that certain meats were acceptable. During the Exodus out of Egypt, God commanded that all of the Israelites to slaughter a lamb and eat it, and instituted the Passover as a lasting tradition to remember God's saving them.[]