The covenant with David showed that the Seed would be the Head of a Kingdom to time indefinite. Once the Law covenant led the Jews to the Messiah, Jehovah revealed further aspects of the fulfillment of his purpose.
(‏ خروج ١٩ :‏ ​ ٥ ،‏ ٦‏ )‏ وَأَظْهَرَ ٱلْعَهْدُ مَعَ دَاوُدَ أَنَّ ٱلنَّسْلَ سَيَكُونُ رَئِيسَ ٱلْمَلَكُوتِ إِلَى ٱلدَّهْرِ .‏