He is the only almighty, so that proves it is God who said that. The verse does not say that Jesus said that. We are not supposed to know if Jesus is God, so the truth is hidden behind ambiguous verses. We do know that there is no verse calling Jesus the Almighy, so we cannot know if Jesus is almighty like the Father. Likewise we cannot know if the Holy Spirit is almighty, or the 7 Spirits of God, or Melchizedek. This is all hidden from us. We should know what is clear in the Bible, but not what is unclear on purpose, that is not for us to know, so let us not be divisive about such issues.