This refers to Jesus' description of how he would suffer and die in Jerusalem, and that he would rise from the dead.
## this word was hidden from them ##
This can be stated in active voice: "God prevented them from understanding the meaning of what he was telling them" (UDB). (See: [[rc://en/ta/man/translate/figs-activepassive]])
## the things that were said ##
This can also be translated in active form as "the things that Jesus said."