Matthew Henry Presbyterian @wholebiblehenry

The walls of the court, or church-yard, were like the rest curtains or hangings, made according to the appointment, Exo 27:9, etc. This represented the state of the Old Testament church: it was a garden enclosed; the worshippers were then confined to a little compass. But the enclosure being of curtains only intimated that the confinement of the church in one particular nation was not to be perpetual.

Commenting on Exodus 38:9-20

Jamieson-Fausset-Brown Reformed @jfbcommentary

sockets--mortices or holes in which the end of the pillars stood.