The story in John 5 is a healing story. Jesus heals a man who was crippled. The man was cured and was able to walk. This sparks a controversy over the law -- because the Pharisees objected that the man who previously couldn't walk was now walking...but carrying his mat (a so-called Sabbath violation). Jesus talks to them on two fronts -- his authority, and the testimony about him. To summarize, Jesus says that he, in fact, has authority from the Father, and he only does what the Father tells him to. And Jesus adds to this three testimonies about himself -- from John the Baptist, from the Father himself, and from Moses (the Law).
We have also been reading the Law that testifies about Jesus. Quite literally, in fact, as we have been reading the specific laws in Exodus. If we look at the reading in Exodus 26, we again see the instruction from to "set up the tabernacle according to the plan shown you on the mountain." So far, this phrase has occurred around instructions about the mercy seat. Here, the same thing. What follows are instructions about the location of the mercy seat in the Most Holy Place. This is the pattern that God wants the Israelites to follow.
This is the pattern that the writer of Hebrews picks up in Hebrews 8-9. In those chapters, he shows how the pattern that Moses was instructed to follow exactly is a representation of the heavenly reality. It is likely that what Hebrews has in mind is the entire scheme of redemption. He says, Jesus serves in the sanctuary, the true tabernacle set up by the Lord, not by a mere human being (8:2). Later, he adds, that when Christ came as high priest of the new covenant, "he went through the greater and more perfect tabernacle that is not made with human hands" (9:11).
The tabernacle pointed the way to Jesus through it's emphasis on sacrifice, blood, purification and the lack of availability to God. There were limits on how often a priest could approach the Most Holy Place and instructions on how this approach was to be made. It prefigured the difficulty in gaining pure and unfettered access to God. It required sacrifice. And that sacrifice was Jesus, and now we have unlimited access to God, and are able to approach him with confidence. This is the reality that Jesus spoke of in John 5 when he said that scripture spoke about Jesus and condemned those who heard but did not obey. May God's glory in Christ and in salvation be made known to you today.