Exodus 40:1-3

Then the LORD spoke to Moses, saying, “On the first day of the first month (Abib) you shall set up the tabernacle of the Tent of Meeting [of God with you]. You shall place the ark of the Testimony there, and you shall screen off the ark [from the Holy Place of God’s Presence] with the veil (partition curtain). [Heb 10:19-23]