The two phrases refer to the same action. (See: [[rc://en/ta/man/translate/figs-parallelism]])
## For his reign is ... and his kingdom endures ... ##
These two phrases mean basically the same thing and are used to emphasis how God's reign never ends. AT: "He rules forever. His kingdom will never end." (See: [[rc://en/ta/man/translate/figs-parallelism]])