JOY Isaiah 51:11

Those the LORD has rescued will return. They will enter Zion with singing; everlasting joy will crown their heads. Gladness and joy will overtake them, and sorrow and sighing will flee away. 

Those the LORD has rescued will return 
Isaiah 35:9-10a  No lion will be there, nor any ravenous beast; they will not be found there. But only the redeemed will walk there, and those the LORD has rescued will return.
Isaiah 44:23  Sing for joy, you heavens, for the LORD has done this; shout aloud, you earth beneath. Burst into song, you mountains, you forests and all your trees, for the LORD has redeemed Jacob, he displays his glory in Israel.

They will enter Zion with singing 
Psalm 109:28  While they curse, may you bless; may those who attack me be put to shame, but may your servant rejoice.
Isaiah 65:14  "My servants will sing out of the joy of their hearts, but you will cry out from anguish of heart and wail in brokenness of spirit."
Jeremiah 30:19  " 'From them will come songs of thanksgiving and the sound of rejoicing. I will add to their numbers, and they will not be decreased; I will bring them honor, and they will not be disdained.' "
Zephaniah 3:14  Sing, Daughter of Zion; shout aloud, Israel! Be glad and rejoice with all your heart, Daughter of Jerusalem!

Gladness and joy will overtake them 
Isaiah 48:20  Leave Babylon, flee from the Babylonians! Announce this with shouts of joy and proclaim it. Send it out to the ends of the earth; say, "The LORD has redeemed his servant Jacob."
Jeremiah 33:10-11  "This is what the LORD says: 'You say about this place, "It is a desolate waste, without people or animals." Yet in the towns of Judah and the streets of Jerusalem that are deserted, inhabited by neither people nor animals, there will be heard once more the sounds of joy and gladness, the voices of bride and bridegroom, and the voices of those who bring thank offerings to the house of the LORD, saying, "Give thanks to the LORD Almighty, for the LORD is good; his love endures forever." For I will restore the fortunes of the land as they were before,' says the LORD."

and sorrow and sighing will flee away 
Isaiah 30:19  People of Zion, who live in Jerusalem, you will weep no more. How gracious he will be when you cry for help! As soon as he hears, he will answer you.
Jeremiah 31:13  "Then young women will dance and be glad, young men and old as well. I will turn their mourning into gladness; I will give them comfort and joy instead of sorrow."
Revelation 7:17  "For the Lamb at the center of the throne will be their shepherd; 'he will lead them to springs of living water.' (Isaiah 49:10) 'And God will wipe away every tear from their eyes.' (Isaiah 25:8)"

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.™ Used by permission. All rights reserved worldwide.