The scriptures that show Jesus rising from the dead with His body for a start.
That body is the transformed and glorified and incorruptible and immortal body that other Christians are said to rise with.
This body is spoken of in 1Cor 15 and the phrase "flesh and blood" is synonymous for corruptible.
1Cor 15:50, the whole verse, says 50 "I declare to you, brothers and sisters, that flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable."
At John 17:5 Jesus does not have to be a spirit to have the same glory he had before coming to earth, but of course when Jesus rose from the dead He did fill all things and become that life giving Spirit, the Spirit of Christ, the Holy Spirit, as well as remain a man with a body, who rose to heaven with that body as a transformed man. He now fill the whole universe (Eph 4:10) as the One Spirit (Eph 4:4) while still remaining a man on the throne of David and mediating a new Covenant. (1Tim 2:5)
1Pet 3:18 For Christ also
msuffered
2 nonce for sins, the righteous for the unrighteous,
othat he might bring us to God, being put to death
pin the flesh but made alive
qin the spirit,
3 he went and
qproclaimed
4 to the spirits in prison,
This is what Jesus did, as a spirit in hades, between when He died and rose again.
The JWs have a bit of a tangled web on this point of what a human is and what happens after death and what happens in the resurrection.