Exodus 27:4
"And thou shalt make for it a grate of network of brass; and upon the net shalt thou make four brasen rings in the four corners thereof."
Cross References (ranked by relevance)
Exodus 35:16
The altar of burnt offering, with his brasen grate, his staves, and all his vessels, the laver and his foot,
Exodus 25:12
And thou shalt cast four rings of gold for it, and put them in the four corners thereof; and two rings shall be in the one side of it, and two rings in the other side of it.