Exodus 37:3

And he cast for it four rings of gold to be set in its four corners: two rings on one side, and two rings on the other side of it.

Surrounding context

37:2 He overlaid it with pure gold inside and outside, and made a molding of gold all around it.

37:3 And he cast for it four rings of gold to be set in its four corners: two rings on one side, and two rings on the other side of it.

37:4 He made poles of acacia wood, and overlaid them with gold.