This is a metaphor that means people, like builders, rejected Jesus, but God has made him the most important stone in a building. (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-explicit]])
This can be stated in active form. Alternate translation: "the stone that the builders rejected" (See: [[rc://en/ta/man/translate/figs-activepassive]])