The belief that something immaterial ,intangible or immortal that leaves the body on death is a Platonic philosophical speculation or theological bias, and it is nowhere to be found in scriptures.
The Bible helps us understand what a soul is.
ADAM BECAME A LIVING SOUL.
In the verse below we read that Adam became a living soul, observe, that Adam was not given a soul, hence man was a soul.
"And the Lord God formed man of the dust of the ground, and breathed
into his nostrils the breath of life; and man became a living soul. "
Genesis 2:7 (NASB)
" Then the Lord God formed man of dust from the ground, and breathed
into his nostrils the breath of life; and man became a living being."
THE SOUL WHO SINS WILL DIE.
Ezekiel 18:4 (NASB)
"Behold, all souls are Mine; the soul of the father as well as the
soul of the son is Mine. The soul who sins will die."
CAN A SOUL DIE?
Leviticus 24:17-18 (YLT)
17 "And when a man smiteth any soul of man, he is certainly put to
death.18 `And he who smiteth a beast repayeth it, body for body."
Leviticus 24:17-18 (NASB)
17 ‘If a man takes the life of any human being, he shall surely be put
to death. 18 The one who [b]takes the life of an animal shall make it
good, life for life.
Acts 3:23 (NASB)
23" And it will be that every soul that does not heed that prophet
shall be utterly destroyed from among the people.
Acts 2:23 (ERV)
23 "And anyone who refuses to obey that prophet will die, separated
from God’s people."
Naturally only eight souls were saved, but not their lives.
1 Peter 3:20 (DARBY)
20 "Heretofore disobedient, when the long-suffering of God waited in
[the] days of Noah while the ark was preparing, into which few, that
is, eight souls, were saved through water:"
DO ANIMALS , FISH HAVE SOULS?
Genesis 1:20 (DARBY)
20" And God said, Let the waters swarm with swarms of living souls,
and let fowl fly above the earth in the expanse of the heavens."
Genesis 1:24 (DARBY)
24 "And God said, Let the earth bring forth living souls after their
kind, cattle, and creeping thing, and beast of the earth, after their
kind. And it was so."
Matthew 10:28 (YLT)
28 "And be not afraid of those killing the body, and are not able to
kill the soul, but fear rather Him who is able both soul and body to
destroy in gehenna."
We read in the verse above, to fear God that can destroy both soul and body in gehenna, this proves that the soul is not something immortal that lives after the body dies. There are scores of scriptures that show that "nephesh", "phykhe" or soul are mortal and are subject to death.
Leviticus 17:11 (NASB)
11 For the life of the flesh is in the blood, and I have given it to
you on the altar to make atonement for your souls; for it is the blood
by reason of the [b]life that makes atonement.’
Leviticus 17:11 Darby (DARBY)
11 "For the soul of the flesh is in the blood; and I have given it to you upon the altar to make atonement for your souls, for it is the blood that maketh atonement for the soul".
Since the soul / life of the flesh is in the blood,” what is represented as being at the foot of the altar is the blood of faithful servants of Jesus "who had been slain because of the word of God and the testimony they had maintained" (Rev 6:9 NIV)
The Priest springle the blood at the base of the altar as a burnt offering.
Leviticus 3:2 (NASB)
He shall lay his hand on the head of his offering and slay it at the
doorway of the tent of meeting, and Aaron’s sons the priests shall
sprinkle the blood around on the altar."
Their deaths represent a sacrificial offering.
Revelation 6:9 (NIV)
"When he opened the fifth seal, I saw under the altar the souls of
those who had been slain because of the word of God and the testimony
they had maintained".