Psalms 96:10

We have here instructions given to those who were to preach the gospel to the nations what to preach, or to those who had themselves received the gospel what account to give of it to their neighbours, what to say among the heathen; and it is an illustrious prophecy of the setting up of the kingdom of Christ upon the ruins of the devil's kingdom, which began immediately after his ascension and will continue in the doing till the mystery of God be finished. I. Let it be told that the Lord reigns, the Lord Christ reigns, that King whom God determined to set upon his holy hill of Zion. See how this was first said among the heathen by Peter, Act 10:42. Some of the ancients added a gloss to this, which by degrees crept into the text, The Lord reigneth from the tree (so Justin Martyr, Austin, and others, quote it), meaning the cross, when he had this title written over him, The King of the Jews. It was because he became obedient to death, even the death of the cross, that God exalted him, and gave him a name above every name, a throne above every throne. Some of the heathen came betimes to enquire after him that was born King of the Jews, Mat 2:2. Now let them know that he has come and his kingdom is set up. II. Let it be told that Christ's government will be the world's happy settlement.

— Matthew Henry's Concise Commentary (public domain)