Verse 8 – Little is known about these women who served at the entrance of the tabernacle. I would assume they did whatever the priest told them to do.
Verse 21 – In building the tabernacle, Moses laid out the steps but Ithamar supervised. God didn’t ask Moses to build the tabernacle but to motivate the experts. We all have areas where God has gifted us and He will give us opportunities to allow God to use those gifts.