פירוש על שמואל ב 7:1

And Hashem granted him rest. [Dovid] said [The condition] has been fulfilled, "And He has granted you peace from all your enemies etc." (Devarim 12:10). What is written after [that verse]? "Let it be that the place that [Hashem, your Elokim] chooses etc." It is now [incumbent] upon us to build the Chosen House.