Exodus 30:4

30:4 You are to make two gold rings for it under its border, on its two flanks; you are to make them on its two sides. The rings will be places for poles to carry it with.

Exodus 35:22

35:22 They came, men and women alike, all who had willing hearts. They brought brooches, earrings, rings and ornaments, all kinds of gold jewelry, and everyone came who waved a wave offering of gold to the Lord.