The word Trinity is not mentioned in the bible in the first place. There is no mention of three Gods, the Bible only has one God. The name of God is given as “I AM THAT I AM” the Hebrew words that make this name are Yahweh, or Jehovah. This one God manifests in three persons, as the Father, the Son and the Holy Spirit. These are not three gods, but three manifestations of the one God. Here is what Yahweh says of himself in the book of the prophet Isaiah.
Isaiah 44:6 Thus saith the LORD the King of Israel, and his redeemer the LORD of hosts I am the first, and I am the last and beside me there is no God. Jesus also said
Revelation of Jesus Christ 1:7–8 Fear not I am the first and the last I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen. There is no verse in the bible that can prove that but the concept is this. Read the bible for more information.
Feb 20, 2022