Exodus 38:4
And he made for the altar a brasen grate of network under the compass thereof beneath unto the midst of it.
Cross-references
Exodus 27:4
Parallel
Exodus 27:4 commands making a bronze grating with four rings, which is exactly what is being constructed here.
Exodus 27:5
Parallel
Exodus 27:5 specifies placing the grating under the altar's ledge to its middle, matching the description of the work done here.