Exodus 38:3-7

3He made all the utensils and vessels of the altar [of burnt offering], the pots, shovels, basins [to catch the blood of the sacrificed animal], meat hooks and the firepans [to store live coals]. He made all its utensils of bronze.

4He made for the altar a grating of bronze mesh under its rim, extending halfway up it.

5He cast four rings for the four corners of the bronze grating as holders for the carrying poles.

6And he made the carrying poles of acacia wood and overlaid them with bronze.

7He put the poles through the rings on the sides of the altar, with which to carry it; he made it hollow with planks.