This was to fulfill what was spoken through the prophet:
“I will open My mouth in parables;
I will utter things hidden since the foundation of the world.”

Now these things happened to them as an example, and they were written for our instruction, upon whom the ends of the ages have come.

For

Now this Hagar is Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.

And when He had taken some bread and given thanks, He broke it and gave it to them, saying, “This is My body which is given for you; do this in remembrance of Me.”

and all drank the same spiritual drink, for they were drinking from a spiritual rock which followed them; and the rock was Christ.

The two

Brethren, I speak in terms of human relations: even though it is only a man’s covenant, yet when it has been ratified, no one sets it aside or adds conditions to it.

so much the more also Jesus has become the guarantee of a better covenant.

But now He has obtained a more excellent ministry, by as much as He is also the mediator of a better covenant, which has been enacted on better promises.

For this reason He is the mediator of a new covenant, so that, since a death has taken place for the redemption of the transgressions that were committed under the first covenant, those who have been called may receive the promise of the eternal inheritance.

And the Holy Spirit also testifies to us; for after saying,

and to Jesus, the mediator of a new covenant, and to the sprinkled blood, which speaks better than the blood of Abel.

Now the God of peace, who brought up from the dead the great Shepherd of the sheep through the blood of the eternal covenant, even Jesus our Lord,

Which

It was for freedom that Christ set us free; therefore keep standing firm and do not be subject again to a yoke of slavery.

For you have not received a spirit of slavery leading to fear again, but you have received a spirit of adoption as sons by which we cry out, “Abba! Father!”

General references

The Lord then spoke to Moses at Mount Sinai, saying,