Cross reference
Psalms 136:3
3 O give praise to the Lord of lords: for his mercy is unchanging for ever.
1 Timothy 6:15
15 Which at the right time he will make clear, who is the eternal and only Ruler, King of kings, and Lord of lords;
Revelation 17:14
14 These will make war against the Lamb, and the Lamb will overcome them, because he is the Lord of lords and King of kings; and those who are with him are named, marked out, and true.
Revelation 19:16
16 And on his robe and on his leg is a name, KING OF KINGS, AND LORD OF LORDS.