Charles Ellicott Commentary Exodus 35:24

"Every one that did offer an offering of silver and brass brought Jehovah`s offering; and every man, with whom was found acacia wood for any work of the service, brought it." — Exodus 35:24 (ASV)

An offering of silver. —Silver had been enumerated among the offerings which would be accepted (Exodus 25:3; Exodus 35:5), and it was therefore brought; but it is difficult to say what was done with it. All the silver actually employed in the sanctuary came from the half-shekels paid when the people were numbered. (See Exodus 38:25-28.) Perhaps the silver free-will offerings were returned to the donors.