1 John 5:6 TLB

[6] And we know he is, because God said so with a voice from heaven when Jesus was baptized, and again as he was facing death-yes, not only at his baptism but also as he faced death. And the Holy Spirit, forever truthful, says it too. So we have these three witnesses: the voice of the Holy Spirit in our hearts, the voice from heaven at Christ's baptism, and the voice before he died. And they all say the same thing: that Jesus Christ is the Son of God.