We must first establish what body he began with - scripture shows...
Heb 2:17 He had to be made like His brethren in all things
Jesus is the second Adam (human)
v14 therefore, since the children share in flesh and blood, He Himself likewise also partook of the same, that through death He might render powerless him who had the power of death, that is, the devil.
So we're human - Jesus had to be human too.
He said, 'I am a man who has told you the truth' John 8:40 (was Jesus lying - did he not know he was the eternally living 'God the Son'?)
Which brings us to the Lamb of God - Rev 5:13, 6:16, 7:9, 7:10, 21:22 a sample of verses showing the Lamb is not God, and God is not the Lamb.
Jesus is a man, born of the flesh through Mary, given the holy spirit at baptism (as we are as a deposit only), and died for the sins of the world, remained dead for 3 days until his Father/God raised him.
The bible presents no support for a God/man who is an immortal God who can die. He is either immortal or he is not.
Now to the King eternal, immortal, invisible, the only God 1 Tim 1:17
Jesus was raised to life where he COULD NOT DIE AGAIN.
knowing that Christ, having been raised from the dead, is never to die
again; death no longer is master over Him. Rom 6:9
Why does Paul make such a big deal about Jesus being raised from the dead if he was just a pretend temporary body - as the eternal 'God the Son' cannot die? 1 Cor 15
If God, who, 'so loved the world', did indeed 'send His only begotten son' (John 3:16) to die - then we either believe Jesus was a human or something other that only 1/2 died. Notice it is GOD sending his son - not the Father sending His son.
Why does Jesus inherit all things if he allegedly made everything?
Why does the last Adam become a life-giving spirit if he already was?
Why, if the Father has life in himself, so he has granted the Son also to have life in himself, if Jesus had it all along? John 5:26
Why is Jesus exalted to 'God's' right hand and given the promised holy spirit to distribute if he was God the Son?
All this to show that Jesus was a man. There is consistent and unequivocal support for this truth.
For Christ also died for sins once for all, the just for the unjust,
so that He might bring us to God, having been put to death in the
flesh, but made alive in the spirit 1 Pet 3:18
Exalted to the right hand of God, he has received from the Father the
promised Holy Spirit
Jesus...will transform our lowly bodies so that they will be like his
glorious body. Phil 3:21
So we still have bodies - just as Jesus did and does saying,
‘See my hands and my feet, that it is I myself; touch me and see, for a spirit does not have flesh and bones as you see that I have.’ Luke 24:39
Did Jesus’ spirit return to His old crucified body?
It is an odd Q, with 'return' included. This is ambiguous. Where did Jesus go when he died? Into the tomb where he remained. He was 'awakened' by God and given not the human spirit again, but a new spirit life that cannot die. But yes, and he still has the same body as he expressed. Just as we will have our bodies, but transformed in glory.
We must not confuse being a spirit - like God and angels, with being a transformed human who is reborn by or into the spirit. see more here,
What does the risen Jesus mean, 'for a spirit does not have flesh and bones as you see I have'. Luke 24:39?