'Mountain of the Lord' in the Bible

And it shall come to pass in the last days, that the mountain of the LORD's house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.

And many people shall go and say, Come, and let us go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the LORD from Jerusalem.

You shall have a song, as in the night when a holy feast is kept; and gladness of heart, as when one goes with a flute to come into the mountain of the LORD, to the mighty One of Israel.