Exodus 35:4

And Moses spake unto all the congregation of the children of Israel, saying, This is the thing which the Lord commanded, saying,

Cross-references

Exodus 35:29 records the people's freewill offerings in response — fulfilling the command given here in 35:4.

Exodus 25:1 is God's original command to Moses for the tabernacle — here Moses relays it to the people.

Exodus 25:2 gives the specific instruction for a freewill offering — here Moses begins to communicate that to the congregation.