When thy days be fulfilled; when the time of thy life shall expire. This phrase implies that his days shall be completed and prolonged to the usual course and stint of nature, and not out off in the midst, by any violent or untimely death. I will set up thy seed after thee; I will set up in thy stead and throne thy posterity, first Solomon, and then others successively, and at last the Messias. So the following words may be understood diversely, part of his posterity in general or indefinitely taken, part of Solomon, and part of Christ only, according to the differing nature of the several passages. Out of thy bowels; out of thy inward parts, or from thy loins; who shall be begotten by thee.
Related Commentaries of 2 Samuel 7:12
2 Samuel 7:12
12 And when thy days be fulfilled, and thou shalt sleep with thy fathers, I will set up thy seed after thee, which shall proceed out of thy bowels, and I will establish his kingdom.