God is immortal, so He cannot die. His only begotten Son was not immortal - Jesus could die. Jesus humbly prayed to God that after his death that God would restore him to the glory that he had before the creation of the world - John 17:5 (WEB):
(5) Now, Father, glorify me with your own self with the glory which I had with you before the world existed.
but God didn't do that, instead He gave Jesus greater glory than he had previously, He gave him a new nature - the same immortal divine nature that God has - Philippians 2:5-11 (WEB):
(9) Therefore God also highly exalted him, and gave to him the name which is above every name;
(10) that at the name of Jesus every knee should bow, of those in heaven, those on earth, and those under the earth,
(11) and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
(5) Have this in your mind, which was also in Christ Jesus,
(6) who, existing in the form of God, didn’t consider equality with God a thing to be grasped,
(7) but emptied himself, taking the form of a servant, being made in the likeness of men.
(8) And being found in human form, he humbled himself, becoming obedient to the point of death, yes, the death of the cross.
(9) Therefore God also highly exalted him, and gave to him the name which is above every name;
(10) that at the name of Jesus every knee should bow, of those in heaven, those on earth, and those under the earth,
(11) and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
So died, but he cannot die again; Jesus is now immortal - Revelation 1:18 (UASV+):
(18) and the living one, and I became dead, but look! I am living forever and ever, and I have the keys of death and of Hades.
He sure did die, and then went and preached to imprisoned spirits in hell.
So it is speaking of his bodily death, and of course His body was later resurrected.
Peter said death could not hold Christ, as He is the Life and the Resurrection The Prince of Life.
The Eternal Word
1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through Him, and without Him nothing was made that was made. 4
In Him was life, and the life was the light of men. 5 And the light shines in the darkness, and the darkness did not [
a]comprehend it.
Acts 3
13 The God of Abraham, Isaac, and Jacob, the God of our fathers, glorified His Servant Jesus, whom you delivered up and denied in the presence of Pilate, when he was determined to let
Him go. 14 But you denied the Holy One and the Just, and asked for a murderer to be granted to you, 15
and killed the [b]Prince of life, whom God raised from the dead, of which we are witnesses. 16 And His name, through faith in His name, has made this man strong, whom you see and know.
Yes, the faith which comes through Him has given him this perfect soundness in the presence of you all.
17 “Yet now, brethren, I know that you did
it in ignorance, as
did also your rulers. 18 But those things which God foretold by the mouth of all His prophets, that the Christ would suffer, He has thus fulfilled. 19
Repent therefore and be converted, that your sins may be blotted out, so that times of refreshing may come from the presence of the Lord, 20 and that He may send [c]Jesus Christ, who was [d]preached to you before, 21 whom heaven must receive until the times of restoration of all things, which God has spoken by the mouth of all His holy prophets since [e]the world began. 22 For Moses truly said to the fathers, ‘The Lord your God will raise up for you a Prophet like me from your brethren. Him you shall hear in all things, whatever He says to you. 23 And it shall be
that every soul who will not hear that Prophet shall be utterly destroyed from among the people.’ 24 Yes, and all the prophets, from Samuel and those who follow, as many as have spoken, have also [
f]foretold these days. 25 You are sons of the prophets, and of the covenant which God made with our fathers, saying to Abraham, ‘And in your seed all the families of the earth shall be blessed.’ 26 To you first, God, having raised up His Servant Jesus, sent Him to bless you, in turning away every one
of you from your iniquities.”
Acts 2
22 “Men of Israel, hear these words: Jesus of Nazareth, a Man attested by God to you by miracles, wonders, and signs which God did through Him in your midst, as you yourselves also know— 23 Him, being delivered by the determined purpose and foreknowledge of God, you [
f]have taken by lawless hands, have crucified, and put to death; 24
whom God raised up, having [g]loosed the [h]pains of death, because it was not possible that He should be held by it. 25 For David says concerning Him:
‘I foresaw the Lord always before my face,
For He is at my right hand, that I may not be shaken.
26 Therefore my heart rejoiced, and my tongue was glad;
Moreover my flesh also will rest in hope.
27 For You will not leave my soul in Hades,
Nor will You allow Your Holy One to see corruption.
28 You have made known to me the ways of life;
You will make me full of joy in Your presence.’
29 “Men
and brethren, let
me speak freely to you of the patriarch David, that he is both dead and buried, and his tomb is with us to this day. 30 Therefore, being a prophet, and knowing that God had sworn with an oath to him that of the fruit of his body, [
i]according to the flesh, He would raise up the Christ to sit on his throne, 31 he, foreseeing this, spoke concerning the resurrection of the Christ, that His soul was not left in Hades, nor did His flesh see corruption. 32 This Jesus God has raised up, of which we are all witnesses. 33
Therefore being exalted [j]to the right hand of God, and having received from the Father the promise of the Holy Spirit, He poured out this which you now see and hear.