Exodus 37:1-3

BSB(i) 1 Bezalel went on to construct the ark of acacia wood, two and a half cubits long, a cubit and a half wide, and a cubit and a half high. 2 He overlaid it with pure gold, both inside and out, and made a gold molding around it. 3 And he cast four gold rings for its four feet, two rings on one side and two on the other.