Apologies if this has already been shown, but here's a quote from Watchtower 1953 15th October page 636
Filling the House with Glory study article
'The number of the spiritual remnant will get smaller year by year as Jehovah removes some of them from this earthly quarry of preparation and places them as "living stones" in the heavenly temple. But oh the throngs of hundreds of thousands of the choicest class of people out of all the nations that now crowd the house of Jehovah’s worship, and these being added to by the thousands from year to year! What glory, what impressive weight, this gives to Jehovah’s house, a glory never lessening but ever increasing as time marches on to Armageddon! Truly all nations must now know that Jehovah has a house of worship and that it is teeming with worshipers. His worship is a reality that cannot be stamped out any more than men could stamp out his "spiritual house," his temple of "living stones.'