Because thou hast shed much blood upon the earth; not that wars either now are or then were simply unlawful, or that David sinned in shedding the blood of war; for it is manifest that David's wars were undertaken by God's command, or with his leave, and were attended with his blessing; but partly because David's military employments did for a good while fill his head and hands, and gave him no leisure for temple work; and principally for mystical signification, to teach us that the church (whereof the temple was a manifest and illustrious type) should be built by Christ, the Prince of peace, Isaiah 9:6; and that it should be gathered and built up, not by might or power, or by force of arms, but by God's Spirit, Malachi 4:6, and by the preaching the gospel of peace. In my sight; which I have taken particular notice of. And this expression may possibly be added in reference to Uriah and the rest of the Israelites, who were slain at the siege of Rabbah by David's contrivance; which peradventure David had in his eye, Psalms 51:4, where David, confessing this sin, useth this very expression, I have done this evil in thy sight.
Related Commentaries of 1 Chronicles 22:8
1 Chronicles 22:8
8 But the word of the LORD came to me, saying, Thou hast shed blood abundantly, and hast made great wars: thou shalt not build an house unto my name, because thou hast shed much blood upon the earth in my sight.