John 1:33-34

Amplified Bible

³³ I did not recognize Him [as the Messiah], but He who sent me to baptize ^[a]in water said to me, ‘He upon whom you see the Spirit descend and remain, this One is He who baptizes with the Holy Spirit.’ ³⁴ I myself have [actually] seen [that happen], and my testimony is that this is the Son of God!”