John 1:33-37

And I did not recognize Him, but He who sent me to baptize in water said to me, ‘He upon whom you see the Spirit descending and remaining upon Him, this is the One who baptizes in the Holy Spirit.’

And I myself have seen, and have testified that this is the Son of God.” Jesus’ Public Ministry; First Converts

Again the next day John was standing with two of his disciples,

and he looked at Jesus as He walked, and *said, “Behold, the Lamb of God!”

And the two disciples heard him speak, and they followed Jesus.