David did not accuse his mother of sin in begetting him;
Yes he did, if he was conceived with sin, which can only be by conception of lust:
But every man is tempted, when he is drawn away of his own lust, and enticed. Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
Only from the heart is sin conceived by lust to do so. Any creature conceived with sin, is because it is conceived by lust.
As saith the proverb of the ancients, Wickedness proceedeth from the wicked: but mine hand shall not be upon thee.
Wherefore, as by one man sin entered into the world.
Sin only proceeds from sin, and sin only enters by sinning, And so anything entering into the world with sin is only by sin, which can only be by sinning.
Man does not enter into the world with sin as all sin does, and all sin only enters into the world by man sinning.
Souls are not created with sin by God, nor are babies conceived in the womb with sin by female creatures, whether of man or beast.
Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.
Being conceived in the marriage bed is undefiled and not from nor by sin: neither the husband nor the wife are sinning, nor are they conceiving sin, which is what all sinful things are.
"brought forth amidst labor pains,"
Mortality is labor and pain in this world for all creatures, including the feamale of any creature at birth. Man and woman do not labor in pain and sweat because they sinned, but because they are now born with mortal bodies subject to nature like all creatures. Lions and lambs labor in birth without sin, even as woman.
Man was created in the likeness of God, "after his image," in a state of holiness, and innocence, Gen_8:21;
And still does, just like any created soul breathed into the womb of a woman, to give birth to a newborn babe that has not sinned like all men.
"Adam begat a son in his own likeness, after his image,"
True, bodily. God makes souls, not man. Natural man like all naturally born creatures of the earth only produce natural flesh from natural seed, which are thus made after their own image, whether man, lion, fish, or tree.
But only man is a living soul created by God in the lowest parts of the earth, and breathed into the sinless womb of a woman. No physical seed nor womb is sinful with sin nature.
This certifies that one has the germ of sin from conception and birth.
For all flesh is as grass, and all the glory of man as the flower of grass. The grass withereth, and the flower thereof falleth away.
As with grass, so with all flesh. Neither grass nor dust nor flesh is sinful nor righteous by nature: it is nothing.
Even as circumcision of the flesh is nothing:
Circumcision is nothing, and uncircumcision is nothing, but the keeping of the commandments of God.
There is no sin germ nor gene in physical seed of man, nor in any physical thing on earth, whether the seed of man or of beasts or of trees of the field. It does by nature what God made it to do: to be fruitful and multiply:
God commanded man and woman to be fruitful and multiply the same as all other living creatures God created on earth, and it was called good not sinful, and after the flood He made the same commandment again (Gen 9:1) as at the beginning, and it remains good, not sinful.
The mortal body of flesh and bone and blood is nothing and dead without the spirit.
I know, and am persuaded by the Lord Jesus, that there is nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him it is unclean.
Nothing physical on earth is unclean of itself: there is no sinful nature in it.
The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men.
Jesus Christ made all things physical on earth, including the souls of men, with His life and light, not with sin.
For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies: These are the things which defile a man: but to eat with unwashen hands defileth not a man.
The heart of man is not the physical heart of the mortal body: lust and evil thinking does not proceed from a blood pump.
Man cannot blame the sin nature nor the natural body for sinning in the flesh.
Man is a soul and spiritual being, not a body of flesh and blood: the soul is the blame for sinning with mortal bodies on earth.
The body is not the cause for gluttony and drunkenness and fornication, but the soul of man covered with mortal flesh is.
The earthen vessel is not the vessel of wrath: the soul which sinneth with the body, it shall die. The soul does the sinning, not the body.
And yes, there are foolish Christian sinners that think the old man of sin is the physical body, and so while their body remains a vessel of wrath going on still in sins with sin nature, their souls are vessels of honor and mercy preserved with divine nature in heavenly places.
Their souls are no more judged for sins of the body, but only the body is judged for sinning.
Being born with the sin nature from sinful physical seed of man, is the foolish tradition of men producing such strong delusion.