Actually in effect my question was whether the Davidic Covenant can be defined using scripture. To provide a text, I took another look at 2 Sam 7, 1 Chron 17 and 2 Chron 6, and I think I may have found the answer. We have at 2 Chron 6:16, “‘If your descendants guard their behavior and faithfully follow my Law as you have done, one of them will always sit on the throne of Israel”; so, it seems that David’s line is obligated to follow the law (God’s side of the covenant being to always keep a descendant of David on the throne). One could also quote other verses in the chapters I specified to make a case that under this covenant David’s line is obligated to build the temple. How do other folks here understand it?