I, yes I, am the LORD, and there is no Savior but Me.
The Jewish authorities were questioning Jesus about God the Father and he replied (John 8:19)
He had already told them about his divine origin (John 8:23, 38)
Jesus took their statement to another level (John 8:57, 58). Not only had he seen Abraham but he was in existence not just before Abraham (which would read ἤμην - ‘I was’) but eternally ‘ἐγὼ εἰμί’. Note that their response was to pick up stones to throw at him just as in John 10:31 where we are explicitly told their response was to his perceived blasphemy.
What does Torah say about blasphemy? “‘Moreover, the one who blasphemes the name of YHWH shall surely be put to death; all the congregation shall certainly stone him...” (Leviticus 24:16).
So in John 8:59 their response to his claim was to try and stone him.
John 8:58 reads '...πρὶν (before) Ἀβραὰμ γενέσθαι (was/existed) ἐγὼ εἰμί (I myself am/exist).'
The Greek version (LXX) of the Torah (circa 250 BC) translates "אני הוא" in Deuteronomy 32:39 as "‘See now that I am (ἐγώ εἰμι), And there is no god besides Me..."
Isaiah 41:4 "‘I, YHWH , am the first, and with the last. I am he (ἐγώ εἰμι)’ "
And Isaiah 43:10 reads ““You are My witnesses,” declares YHWH (יהוה) , “And My servant whom I have chosen, So that you may know and believe Me And understand that I am He (ἐγώ εἰμι)...”
Compare this with the words of Jesus to John in Revelation 1:7 “Do not be afraid; I AM (ἐγώ εἰμι) the first and the last..."
Revelation 22:13, 16 "I am the Alpha and the Omega, the first and the last, the beginning and the end... I, Jesus, have sent My angel to testify to you these things for the churches. I am the root and the descendant of David, the bright morning star."
Also Isaiah 43:13; 46:4; 48:12 and... 52:6 is interesting because there YHWH says: "Therefore my people will know my name in that day. For I am (ἐγώ εἰμι/אני הוא), behold I, the one speaking."
There appears to be a subtle pointer here to Exodus 3:14.
In John 10:28-30 we read:
“...I give eternal life to them... and no one will snatch them out of My hand... and no one is able to snatch them out of the Father’s hand. “I and the Father are one.”
Jesus claims to give eternal life and then puts himself on a par with the Father.
“The Jewish authorities picked up stones again to stone Him... “For a good work we do not stone You, but for blasphemy; and because You, being a man, make Yourself out to be God.”
Notice it says they picked up stones again. John is referring back to 8:59 and so tying the charge for both occasions. What did they see as the blasphemy then as well as on this occasion? Claiming to be divine.
"Jesus answered them, “Has it not been written in your Law, ‘I said, you are gods’? “If he called them gods, to whom the word of God came (and the Scripture cannot be broken), do you say of Him, whom the Father sanctified and sent into the world, ‘You are blaspheming,’ because I said, ‘I am the Son of God’?" (John 10:34)
Many interpret Jesus’ words as directed towards human rulers but a reading of the source, Psalm 82 shows that he is referring to the divine council in heaven who were judged for injustice (to whom the word of God came). If that is the case then what Jesus is asserting is that Tanakh describes the divine council as ‘gods’ and so he too is God but not merely of the created heavenly class but as ontologically one with the uncreated, all powerful Most High Father.
“If I do not do the works of My Father, do not believe Me; but if I do them, though you do not believe Me, believe the works, so that you may know and understand that the Father is in Me, and I in the Father.”
He is not just God but, as stated in John 5, the unique Son of God.
“Therefore they were seeking again to seize Him, and He eluded their grasp.” (John 10:28–39)
They knew what he was claiming and that’s why they continued to try and take him.
God is One