What Happens In Respect Of David Will Encourage The Righteous Who As A Consequence Will Rejoice In YHWH And Take Refuge In Him (Psalms 64:10).
And the righteous (those who are faithful to God's covenant) especially will see what God has done, and will gain confidence from it. They will be glad in YHWH (note the covenant name), will gain new confidence in the refuge that He provides. Indeed, all the upright in heart will glory (compare Psalms 63:11).
‘The righteous will be glad in YHWH,
And will take refuge in him,
And all the upright in heart will glory.'
There is nothing like seeing God's activity on behalf of His own for making the righteous glad. They see, and wonder, and rejoice, and have their confidence renewed in His protecting hand. Filled with glory at what He does for His own, they take refuge in Him, with a new confidence in how secure it is. Thus will what has happened to David not only make the world wonder and fear, but will also encourage His true people.