[203] The Baptism into Moses

When a Jew was born from his/her mother prior to the conversion of Cornelius, the child entered into the Land and Circumcision Covenant by circumcision without a baptism. Symbolically the motherís water and blood are standing for two baptisms. But the birth itself is not a baptism. So one does not need to be baptised to enter into every covenant with God (one does however need to be baptised to enter into a salvation covenant with God). The LCC was not a salvation covenant. When a Gentile man or woman was purchased as a slave by a Jew, he or she entered into the law covenant (and hence the ICC, the covenant promised by the 2AC) but not by means of the purchase. Because the purchaser could be by a widow say, a woman, who cannot act as a priest, a mediator of forgiveness of sins. The slave man had to be circumcised, which was his entry into the Land and Circumcision Covenant. And both the slave girl and slave man had to celebrate the Passover.

43 And Jehovah went on to say to Moses and Aaron: This is the statute of the Passover: No foreigner may eat of it. 
44 But where there is any slave man purchased with money, you must circumcise him. Then first he may share in eating it.
45 A settler and a hired labourer may not eat of it.
46 In one house it is to be eaten. You must not take any of the flesh out of the house to some place outside. And you must not break a bone in it. 
47 All the assembly of Israel are to celebrate it. 
48
And in case an alien resident resides as an alien with you and he will actually celebrate the Passover to Jehovah, let there be a circumcising of every male of his. First then he may come near to celebrate it; and he must become like a native of the land. But no uncircumcised man may eat of it. 
49
One law is to exist for the native and for the alien resident who is residing as an alien in your midst (Exodus 12).

For the gentile slave man and the gentile slave woman, the first Passover was their entrance into the Law covenant, so long as they were at least 11 years old (Jesus in the temple questioning and listening to the Pharisees - with Christians this lower age limit is 11 years old - see [Joining8]). This was therefore the forgiveness of sins to the extent that this covenant required, which was a cleanliness of the flesh, which is the forgiveness of sins in the past, in fact by a washing in the blood of the Mediator of that covenant, Moses before the exile and Ezra after the exile. For a bath washes away dirt that has accumulated before the bath, but has no effect on future dirt.

1 Now I do not want you to be ignorant, brothers, that our forefathers were all under the cloud and all passed through the sea 
2 and all got baptized into Moses by means of the cloud and of the sea (1 Corinthians 10).

Earthly water and heavenly water (holy spirit)

29 In this wilderness your carcasses will fall, yes, all your registered ones of all your number from twenty years old upward, you who have murmured against me (Numbers 14). 

So those under 20 were exempted from this national guilt of the whole assembly murmuring against God and Moses and Aaron as a result of the 10 bad reports from the 12 spies. (So Franz plus Dan liked Gordon's work - You are spies says Joseph and his decoding antitype). The reason that these ones were exempted is that they were not eligible for registration to serve in the army, so their opinion of the ease or difficulty of a battle was irrelevant. Hebrews under 11 were not covenanted into the law of Moses.

28 As for the rest of the people, the priests, the Levites, the gatekeepers, the singers, the Nethinim and everyone separating himself from the peoples of the lands to the law of the [true] God, their wives, their sons and their daughters, everyone having knowledge [and] understanding (Numbers 10).

An 11 year old has some knowledge and understanding.

1 That which corresponds to this is also now saving you, namely baptism, (not the putting away of the filth of the flesh, but the request made to God for a good conscience) through the resurrection of Jesus Christ (1 Peter 3).

6 This is he that came by means of water and blood, Jesus Christ. Not with the water only, but with the water and the blood. And the spirit is that which is bearing witness, because the spirit is the truth. 
7 For there are 3 witness bearers, 
8 the spirit and the water and the blood, and the three are in agreement (1 John 5).

22 Let us approach with true hearts in the full assurance of faith, having had our hearts sprinkled from a wicked conscience and our bodies bathed with clean water (Hebrews 10).

13 For if the blood of goats and bulls and the ashes of a heifer sprinkled on those who have been defiled sanctifies to the extent of cleanness of the flesh
14
how much more will the blood of the Christ, who through an everlasting spirit offered himself without blemish to God, cleans our consciences from dead works, that we may render sacred service to the living God. 
15
So that is why he is a mediator of a new covenant, in order that because a death has occurred, for their release by ransom from the transgressions under the former covenant, the ones who have been called might receive the promise of the everlasting inheritance (Hebrews 9).

The priest here was the man, the family head, arranging the Passover feast, which was the forgiveness of the sins for those partaking of the festivities. The widow who buys a slave, is effectively proselytizing, but not baptising.

14 And in case an alien resident should be residing with you as an alien, he also must prepare the Passover sacrifice to Jehovah. According to the statute of the Passover and according to its regular procedure is the way he should do. There should exist one statute for you people, both for the alien resident and for the native of the land (Number 9).

If an alien resident did not celebrate the Passover whilst residing inside the gates of a Jew, the Jew might terminate his stay. However an alien resident could buy a house in a walled city and keep it in perpetuity and not celebrate the Passover without penalty, it would appear.

29 Now in case a man should sell a dwelling house in a walled city, his right of repurchase must also continue till the year from the time of his sale finishes out; his right of repurchase should continue a whole year.
30 But if it should not be bought back before the complete year has come to the full for him, the house that is in the city that has a wall must also stand in perpetuity as the property of its purchaser during his generations. It should not go out in the Jubilee (Leviticus 25).

However, although not being under law himself, in the sense that he was not a party to the law covenant, the law of Israel was the law of Moses, so he would presumably suffer its penalties if he stole etc.