Matthew 5:35

nor 'by earth,' for it is the footstool for His feet; nor 'by Jerusalem,' for it is the city of the great King [i.e., God].

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],

Treasury of Scripture Knowledge

Summary

Beautiful for situation, the joy of the whole earth, is mount Zion, on the sides of the north, the city of the great King.

Bible References

Joy

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],