There are two similar phrases in Exodus 26 & 27. Verse 30 of chapter 26 says:
30 And you shall raise up the tabernacle according to its pattern which you were shown on the mountain.
And speaking of the altar verse 8 of chapter 27 says:
8 You shall make it hollow with boards; as it was shown you on the mountain, so shall they make it.
Moses was told that when it came to raising up the tabernacle and building the altar he was to be careful to follow the instructions he was shown on the mountain.
On the mountain Moses met with God and God spoke to him ( Exodus 24:12-25:1). There he got his “marching orders” for the people, and he was to be careful to carry them out as they were given to him, when he came down.
God knew once Moses came down the mountain there were pressures, opinions, emotions and feelings that might tempt Moses and the people to do things differently to what God had told them to do. They might be tempted to take short cuts or do things as they saw best. God said be careful not to do that.
Today life is lived on and off the mountain. We must regularly go up the mountain, meet with God, read and listen to His Word and hear what He’s saying to us. Then we must come down from the mountain, engage in life and do whatever God told us to do.
Like Moses when we get off the mountain there are people, pressures and perspectives from within us and outside us that tempt us to do things differently to what God told us on the mountain. We must be careful not to let that happen and…
……do what God showed us on the mountain.