John Gill Commentary 1 Chronicles 28:12

"and the pattern of all that he had by the Spirit, for the courts of the house of Jehovah, and for all the chambers round about, for the treasuries of the house of God, and for the treasuries of the dedicated things;" — 1 Chronicles 28:12 (ASV)

Ver. 12 And the pattern of all that he had by the Spirit
By the Spirit of God, who gave him the whole form of the temple, and all things relative to it; just as God showed to Moses the pattern of the tabernacle in the mount; the Targum is, by the spirit of prophecy that was with him. The Jews suppose that Samuel the prophet was first made acquainted with it, and he made it known to David:

of the courts of the house of the Lord :
the outward court, the court of the priests

and of all the chambers round about :
see (1 Kings 6:5)

of the treasuries of the house of God, and of the treasuries of the
dedicated things ;
of the difference of which, see (1 Chronicles 26:20) .