Adam Clarke on Ezra 6:4

Three rows of great stones, and a row of new timber - We have noticed this kind of building before, three courses of stones, and then a course of strong balk; and this continued to the square of the building.

And let the expenses be given - Cyrus had ordered wood to be cut at Libanus, and conveyed to Joppa at his expense; but it does not appear that he furnished the other expenses of the building, for we have already seen that the Jews contributed for the defraying of all others. But it appears that he provided at his own expense the sacrifices and offerings for the temple. See Ezr 6:9.