Romans 9:33
Even as it is written [Ex. 28:16], "Look, I am placing a stone in the city of Zion that people will stumble over and a rock on which they will trip and fall. But the person who believes in Him will not be put to shame [i.e., he will never have unforgiven sin brought up against him]."
Hebrews 12:22
But you [Christians] have come to Mount Zion, to the heavenly Jerusalem, the city of the living God. [Note: These terms describe people who have entered a spiritual relationship with God as part of the church]. [You have come] to a praise gathering of innumerable angels [Note: Christians are here pictured as assembled in worship of God, along with angels],
Revelation 14:1
And I looked, and there in front of me was the Lamb, standing on Mount Zion, and with him were one hundred and forty-four thousand persons, with the Lamb's name and His Father's name written on their foreheads.