Romans 9:33

as it is written: Behold, I lay in Zion a stone of stumbling, and a rock of offense: and whoever believes on him, shall not be ashamed.

Hebrews 12:22

But you have come to Mount Zion, and the city of the living God, the heavenly Jerusalem, and to myriads of angels;

Revelation 14:1

And I saw, and behold, the Lamb stood on the mount Zion, and with him a hundred and forty-four thousand, that had his name and his Father's name written in their foreheads.

Treasury of Scripture Knowledge

Summary

And the inhabitants of Jebus said to David, Thou shalt not come hither. Nevertheless David took the castle of Zion, which is the city of David.

Bible References

The castle

Romans 9:33
as it is written: Behold, I lay in Zion a stone of stumbling, and a rock of offense: and whoever believes on him, shall not be ashamed.
Hebrews 12:22
But you have come to Mount Zion, and the city of the living God, the heavenly Jerusalem, and to myriads of angels;
Revelation 14:1
And I saw, and behold, the Lamb stood on the mount Zion, and with him a hundred and forty-four thousand, that had his name and his Father's name written in their foreheads.