3 items
A jar of manna, Aaron's rod that budded, and the Ten Commandments written on 2 tables of stone by Gods finger.
Manna from heaven fell every day (except the Sabbath) before the sun rose, and people needed to gather it before the sun rose or it melted. I am the bread of life Jesus said in John 6:48, this manna is a symbol of the word of God that we need to gather every morning before we do anything else (before we get too busy). just like we can't live without physical food we can't live without spiritual food. If more was gathered then was needed for that day it went off and worms where found in it, except for Friday they needed to gather enough for two days and it didn't go off. If we gather the bread of life and don't make it part of us (internalize it) it is an external experience (out ward) and it breads worms. We should meet the Lord each day and gather enough food for each day, except on Friday, we should gather extra to prepare for the holy Sabbath.
Aaron's Rod that budded.
In Num 16 it is similar to what Satan did in heaven. Lucifer gathered a third of the angels to rebel against God and thought he was good enough to be in charge. Korah, Dathan, and Abiram are the main one here, verse 3. And they gathered themselves together against Moses and against Aaron, and said unto them, Ye take too much upon you, seeing all the congregation are holy, every one of them, and the LORD is among them: wherefore then lift ye up yourselves above the congregation of the LORD?
It didn't end well for this group they were consumed by fire and swallowed by the earth. The people still didn't learn in verse 41 they blamed Moses for the deaths of the 250. So God allowed a plague to kill 14700 more people that where still rebelling (Slow learners).
What has this got to do with the Rod of Aaron?
Num 17:6 And Moses spake unto the children of Israel, and every one of their princes gave him a rod apiece, for each prince one, according to their fathers' houses, even twelve rods: and the rod of Aaron was among their rods.
Num 17:7 And Moses laid up the rods before the LORD in the tabernacle of witness.
Num 17:8 And it came to pass, that on the morrow Moses went into the tabernacle of witness; and, behold, the rod of Aaron for the house of Levi was budded, and brought forth buds, and bloomed blossoms, and yielded almonds.
Num 17:10 And the LORD said unto Moses, Bring Aaron's rod again before the testimony, to be kept for a token against the rebels; and thou shalt quite take away their murmurings from me, that they die not.
This was a perpetual sign, we don't have a right to make up our own rules or change gods rules. It was out of jealousy that all the trouble started, it began in the mind and it all comes back to faith and trust. By being restless against Gods laws we give Satan access to our minds like the example above and God gave us Aaron's rod to remember that He chooses and we should trust in His directing's. It's a reminder that God is in control and we can trust Him. (Also Christ was dead and is alive. Rev_1:18 I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.)
The last Item is the Ten Commandments
This law was so important that God had to write them in stone Himself. Like Jesus our rock, this law was written on Stone to signify that it does not change and that it lasts forever. The law of God is called the law of Love, If you love me keep my commandments, law of liberty It is love that motivates us to keep the law. Sure it points out our sins but that is good because i can repent and give that sin away.
Rom_13:8 Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law.
Rom_13:10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.
Gal_5:14 For all the law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself.
Jas_2:8 If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:
Luke 10:27
Mark 12:30
Mat 22:37 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind.
Mat 22:38 This is the first and great commandment.
Mat 22:39 And the second is like unto it, Thou shalt love thy neighbour as thyself.
Mat 22:40 On these two commandments hang all the law and the prophets.