Exodus 16:28 says, And the LORD said unto Moses, How long refuse ye to keep my commandments and my laws?  Though it was really the people of Israel who were refusing to obey or doubting God, Moses was God's representative to them, so he was asked the question about refusing to obey God.  As Christians, we are God's representatives to the world today, and we need to pray that God doesn't ask us how long we will refuse to obey His commands, especially the command to carry the gospel into the world.  Verse twenty-nine states, See, for that the LORD hath given you the sabbath, therefore he giveth you on the sixth day the bread of two days; abide ye every man in his place, let no man go out of his place on the seventh day.  God was referring to the keeping of the Sabbath in particular.  God had made provisions for the people to gather enough on the day before so that they could keep the Sabbath set aside for Him.  Since keeping one day, the Sabbath, set aside for God was always important, is it any less important that we keep one day, for us the Lord's Day, or Sunday, set aside for God?  I believe God still expects us to do this.  Verse thirty declares, So the people rested on the seventh day.  The people of Israel obeyed God and rested on the seventh day.   As stated above, we need a day set aside for God every week.  Verse thirty-one says, And the house of Israel called the name thereof Manna: and it was like coriander seed, white; and the taste of it was like wafers made with honey.  They called the bread Manna, and it was sweet tasting, like wafers made with honey.  God didn't just give them bread.  He gave them sweet tasting bread.  God will always give us more than we really deserve if we put our faith in Him.  Verse thirty-two states, And Moses said, This is the thing which the LORD commandeth, Fill an omer of it to be kept for your generations; that they may see the bread wherewith I have fed you in the wilderness, when I brought you forth from the land of Egypt.  Moses told the people to fill an omer with the bread to keep as a memorial to God.  Verse thirty-three adds, And Moses said unto Aaron, Take a pot, and put an omer full of manna therein, and lay it up before the LORD, to be kept for your generations.  Moses told Aaron to fill a pot with the manna to keep as a memorial to God for the generations to come.  If we have a memorial today, it is the empty cross, but most importantly, as followers of Christ, we have the Holy Spirit indwelling us.  Of course, we also observe the Lord's Supper as a memorial to Christ.  Verse thirty-four declares, As the LORD commanded Moses, so Aaron laid it up before the Testimony, to be kept.  Aaron did as God had instructed Moses to do.  This was God's plan and not just Moses' idea.  We need to make sure that God is the source our plan today and that we are not just attempting to get our way by claiming that it is His plan.  Verse thirty-five continues, And the children of Israel did eat manna forty years, until they came to a land inhabited; they did eat manna, until they came unto the borders of the land of Canaan.  God provided the manna for the people of Israel for forty years, until they got to the Promised Land.  Today, God will provide for us if we are followers of Christ until we get to the Promised Land which is Heaven.  Verse thirty-six concludes. Now an omer is the tenth part of an ephah.  This simply gives us the amount that an omer was.