Jamieson, Fausset and Brown on 1 Chronicles 17:9-10

9-10. at the beginning, and since the time that I commanded judges--that is, including the whole period from Joshua to Saul.

I tell thee that the Lord will build thee an house--This was the language of Nathan himself, who was specially directed to assure David, not only of personal blessing and prosperity, but of a continuous line of royal descendants.