II Maccabees:
1 You shall also find it set down in the dispositions made by the prophet Jeremias, that he bade the exiles rescue the sacred fire, in the manner aforesaid. 2 Strict charge he gave them, the Lord’s commandments they should keep ever in mind, nor let false gods, all gold and silver and fine array, steal away their hearts; 3 with much else to confirm them in their regard for the law. 4 And here, in this same docuмent, the story was told, how a divine oracle came to Jeremias, and he must needs go out, with tabernacle and ark to bear him company, to the very mountain Moses climbed long ago, when he had sight of God’s domain. 5 A cave Jeremias found there, in which he set down tabernacle and ark and incense-altar, and stopped up the entrance behind him. 6 There were some that followed; no time they lost in coming up to mark the spot, but find it they could not. 7 He, when they told him of it, rebuked their eagerness; Nay, said he, the place must remain ever unknown, till the day when God brings his people together once more, and is reconciled; 8 then, divinely, the secret shall be made manifest. Then once again the Lord’s majesty shall be seen, and the cloud that enshrines it; the same vision that was granted to Moses, and to Solomon when he prayed that the great God would have his temple on earth; 9 Solomon, the master of wisdom, that in his wisdom offered sacrifice to hallow the temple he had made.
The mountain is called Mount Nebo. The Ark of the Covenant is still there, hidden.