Leviticus 24:8-9
8 Aaron must put new bread on the table every Sabbath day. It shows the covenant that continues for ever between Israel's people and the Lord. 9 The bread will belong to Aaron and his sons. They must eat it in a holy place because it is a very holy offering to the Lord. It will always be a part of the offerings that belongs to the priests.’
24:5Two tenths of an ephah is about 4 litres or 2 kilograms.