Who did john say would come after him?

In the New Testament, specifically in the Gospel of John, John the Baptist indicates that Jesus would come after him. He refers to Jesus as "the Lamb of God" and emphasizes that Jesus is the one who will baptize with the Holy Spirit, signifying a new era in spiritual awakening and fulfillment of prophecy. John underscores that while he is not worthy to untie Jesus' sandals, Jesus holds a greater authority and purpose.