2Ki 22:8
Hilkiah the high priest (cf. 2Ch 34:15) said, “I have found the book of the law in the house of Jehovah.” התּורה ספר, the book of the law (not a law-book or a roll of laws), cannot mean anything else, either grammatically or historically, than the Mosaic book of the law (the Pentateuch), which is so designated, as is generally admitted, in the Chronicles, and the books of Ezra and Nehemiah.
The finding of the book of the law in the temple presupposes that the copy deposited there had come to light. But it by no means follows from this, that before its discovery there were no copies in the hands of the priests and prophets. The book of the law that was found was simply the temple copy, deposited, according to Deu 31:26, by the side of the ark of the covenant, which had been lost under the idolatrous kings Manasseh and Amon, and came to light again now that the temple was being repaired. We cannot learn, either from the account before us, or from the words of the Chronicles (2Ch 34:14), “when they were taking out the money brought into the house of Jehovah, Hilkiah found the book of the law of the Lord,” in what part of the temple it had hitherto lain; and this is of no importance so far as the principal object of the history is concerned. Even the words of the Chronicles simply point out the occasion on which the book was discovered, and do not affirm that it had been lying in one of the treasure-chambers of the temple, as Josephus says. The expression ויּקראהוּ does not imply that Shaphan read the whole book through immediately.