en_tn_lite_do_not_use/psa/045/006.md

Your throne ... is forever and ever

The word "throne" represents the kingdom and rule of the king. Alternate translation: "Your kingdom ... is forever and ever" or "You will reign ... forever and ever" (See: rc://en/ta/man/jit/figs-metonymy)

Your throne, God

Possible meanings are that the word "God" 1) is a title for the king, who is God's representative or 2) modifies the word "throne" and means "Your kingdom that God has given you."

a scepter of justice is the scepter of your kingdom

The word "scepter" represents the king's authority to rule his kingdom. Alternate translation: "you rule your kingdom with justice" (See: rc://en/ta/man/jit/figs-metonymy)