And I will fasten him as a nail in a sure place; and he shall be for a glorious throne to his father's house.
Nail in a sure place. Large nails or pegs stood in ancient houses, on which were suspended the ornaments of the family. The sense is, All that is valuable to the nation shall rest securely on him. In Ezra 9:8, "nail" is used of the large spike driven into the ground to fasten the cords of the tent to, and so is used for the tent itself: "grace hath been showed from the Lord our God ... to give us a nail in his holy place."
Throne - i:e., resting-place to his family, as applied to Eliakim; but "throne," in the strict sense, as applied to Messiah the antitype (Luke 1:32-33).