Temple: Solomon's: The Oracle (Holy of Holies) in
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1 Kings 6:19, 20
Solomon also prepared the inner sanctuary within the temple to set the ark of the covenant of the LORD there. / The inner sanctuary was twenty cubits long, twenty cubits wide, and twenty cubits high. He overlaid the inside with pure gold, and he also overlaid the altar of cedar.
1 Kings 8:6
Then the priests brought the ark of the covenant of the LORD to its place in the inner sanctuary of the temple, the Most Holy Place, beneath the wings of the cherubim.