Shed blood — Not that wars are simply unlawful, but to teach us that the church (whereof the temple was an 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 but by God's spirit, Zechariah 4:6, and by the preaching the Gospel of peace. David therefore was less fit for that service, than one who had not been called to such bloody work. Likewise by setting him aside for this reason, God shewed how precious human life is to him.
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.