This can be stated in active form. Alternate translation: "But when Paul insisted that he stay under Roman guard until the time when the emperor could decide his case" (See: [[rc://en/ta/man/translate/figs-activepassive]])
This can be stated in active form. Alternate translation: "I ordered the soldiers to keep him in custody" or "I told the soldiers to guard him" (See: [[rc://en/ta/man/translate/figs-activepassive]])