Continuous joy is the gift of the redeemed

"Then all who trust in you will be glad
and forever shout for joy.
You will protect them and those will rejoice in you
who love your name." (Psalm 5: 12)

In some translations of the above scripture, the word "joy" is mentioned three times.  When I read it, it reminded me of the popular Christmas tone: "Joy, Joy, Joy......"
Continuous joy is the gift of the redeemed.  A joyful spirit is a sign of the presence of the Holy Spirit.

I share below part of the commentary of above scripture from John Gills Exposition where joy is used several times:

"But let all those that put their trust in thee rejoice
Who trust not in themselves, in their own hearts, in their righteousness, or riches, or strength; but in the name, righteousness, and strength of the Lord: who betake themselves to him, and put all their confidence in him: let them rejoice in the salvation of the Lord, and in hope of eternal glory and happiness;
let them even shout for joy:
not only rejoice inwardly, but express their joy externally, with their voices, and in the loudest manner; and that always, the matter and foundation of a believer's joy always continues; and so does the grace itself: though it is not always in exercise, yet it is an everlasting joy; and with it the redeemed of the Lord will come to Zion, and no man will be able to take away their joy. Which distinguishes it from the triumphing of the wicked, and the joy of the hypocrite, which is but for a moment;"