For at the proper time, he shall reveal the blessed and only Power, the King of kings and the Lord of lords
Other versions
King James Version
Which in his times he shall shew, who is the blessed and only Potentate, the King of kings, and Lord of lords;English Standard Version
which he will display at the proper time--he who is the blessed and only Sovereign, the King of kings and Lord of lords,New International Version
which God will bring about in his own time--God, the blessed and only Ruler, the King of kings and Lord of lords,