Charles Ellicott Commentary 1 Chronicles 28:14

"of gold by weight for the [vessels of] gold, for all vessels of every kind of service; [of silver] for all the vessels of silver by weight, for all vessels of every kind of service;" — 1 Chronicles 28:14 (ASV)

He gave of gold by weight for things of gold.—The Hebrew is very concise.

Apparently it continues the construction of 1 Chronicles 28:12, so that the sense is: “He gave him a pattern or description for the golden vessels (literally, for the gold), by the weight for the golden vessels (Heb., for the gold), for all vessels of each kind of service (i.e., use); and he gave him a pattern for all the silver vessels, by weight, for all vessels of each kind of service.”

In other words, David gave Solomon an account or schedule of all the different vessels of gold and silver that would be required for the sanctuary, specifying the exact weight of each. (Compare to Ezra 8:25 and following, Ezra 8:34.)