Jamieson, Fausset and Brown on 1 Kings 6:7

7. there was neither hammer nor axe nor any tool of iron heard in the house while it was in building--A subterranean quarry has been very recently discovered near Jerusalem, where the temple stones are supposed to have been hewn. There is unequivocal evidence in this quarry that the stones were dressed there; for there are blocks very similar in size, as well as of the same kind of stone, as those found in the ancient remains. Thence, probably, they would be moved on rollers down the Tyropean valley to the very side of the temple [Porter, Tent and Kahn].