Charles Spurgeon Commentary 1 Chronicles 28:11

"Then David gave to Solomon his son the pattern of the porch [of the temple], and of the houses thereof, and of the treasuries thereof, and of the upper rooms thereof, and of the inner chambers thereof, and of the place of the mercy-seat;" — 1 Chronicles 28:11 (ASV)

He had it all ready in his mind; and before he died, he passed on the plans of that wonderful piece of architecture to his son Solomon.