The lyrics you are referring to are from the worship song "Who Else" by
Gateway Worship, written by Abbie Gamboa, Zac Rowe, and Josiah Funderburk. The
specific lines containing "Lamb of God, anointed one, who was and is and is to
come" appear in the bridge of the song. Here is the relevant excerpt from the
lyrics: Bridge:
Lamb of God, anointed one
Who was and is and is to come
Seated on the throne above
Holy, holy
Righteous one who shed His blood
You proved to us the Father's love
Jesus Christ, be lifted up
Holy, holy
The song praises Jesus as the worthy Lamb of God, emphasizing His eternal nature ("who was and is and is to come"), His holiness, and His sacrificial love. It is a worship anthem that exalts Jesus Christ as the only one worthy of praise and exaltation