John Gill Commentary Numbers 3:37

"and the pillars of the court round about, and their sockets, and their pins, and their cords." — Numbers 3:37 (ASV)

And the pillars of the court round about
Of the great court which went round the tabernacle, on which pillars the hangings were hung:

and their sockets ;
into which the, pillars were put; of both which see (Exodus 27:9–17) ;

and their pins, and their cords ,
the pins were fixed in the ground, and the cords fastened the hangings of the court to them, whereby they were kept tight and unmoved by the winds; see (Exodus 27:19) .