Exodus Chapter 40, Verse 2

2: On the first day of the first month shalt thou set up the tabernacle of the tent of the congregation.— edit KJV text
2: The first month, the first day of the month, thou shalt set up the tabernacle of the testimony,— edit Douay text
2: On the first day of the first month, at the new moon, thou shalt set up the tabernacle of witness,— edit LXX text