Revelation 5:5; Revelation 22:16

5 and one of the elders said to me, "Stop weeping; behold, the Lion that is from the tribe of Judah, the Root of David, has overcome so as to open the book and its seven seals."
16 "I, Jesus, have sent My angel to testify to you these things for the churches. I am the root and the descendant of David, the bright morning star."