“But vnto the Sonne, he saith, Thy throne, O God, is for euer and euer: a scepter of righteousnesse is the scepter of thy kingdome.”
1611 King James Version (KJV)
1:8 O God - God, in the singular number, is never in scripture used absolutely of any but the supreme God. Thy reign, of which the sceptre is the ensign, is full of justice and equity. #Psa 45:6|,7.
Heb 1:8 But to the Son he saith. The quotation is from Ps 45:6. Thy throne, O God, [is] for ever and ever. Then the Son has an eternal throne, and is divine. A sceptre of righteousness [is] the sceptre of thy kingdom. He then has a kingdom, and rules it with a righteous scepter. The point is that he is a Divine King with an eternal throne.