4 with three courses of large stones and one of timbers. The costs are to be paid by the royal treasury.

Read Ezra 6:4 Using Other Translations

With three rows of great stones, and a row of new timber: and let the expenses be given out of the king's house:
with three layers of great stones and one layer of timber. Let the cost be paid from the royal treasury.
Every three layers of specially prepared stones will be topped by a layer of timber. All expenses will be paid by the royal treasury.