en_tn/1pe/02/07.md

the stone that was rejected by the builders

"the stone that the builder rejected" (See: rc://en/ta/man/translate/figs-activepassive)

a stone of stumbling and a rock of stumbling.

These two phrases share similar meanings. Together they emphasize that people will take offense at this "stone." (See: rc://en/ta/man/translate/figs-parallelism)