This was your answer to where in the Bible does it say:
However, the verses you quote don't confirm God declaring that Eve "was only a part of Adam". It simply says, "Yahweh God made a woman from the rib which he had taken from the man, and brought her to the man". The rib was a part of Adam, but the woman that God created wasn't part of Adam - she was a new creation, physically different from Adam. At best God used the genetic material to form a woman, but He didn't need to do that. God used part of Adam's flesh so that Eve could be considered one flesh with Adam, enabling Jesus' sacrifice in Adam's place to justify God resurrecting Eve as well as Adam - so that Jesus could be the saviour of ALL mankind.
In the next verse we have Adam saying, “This is now bone of my bones, and flesh of my flesh. She will be called ‘woman,’ because she was taken out of Man.” So neither God nor Adam said that Eve was "only a part of Adam". Eve was no more part of Adam than any person is part of their mother (and father) - we are all genetically derived from our parents but we are individuals, unique creations of God. (Psalms 139:13, "For you formed my inmost being. You knit me together in my mother’s womb"; Jeremiah 1:5, “Before
I formed you in the womb, I knew you”).
Moses commented in the next verse, "Therefore a man will leave his father and his mother, and will join with his wife, and they will be one flesh". It is declaring that the relation of a man to his wife is closer than that to his father and mother. It is asserting the sanctity of marriage.
Mark 10:2-9 (WEB):
(2) Pharisees came to him testing him, and asked him, “Is it lawful for a man to divorce his wife?”
(3) He answered, “What did Moses command you?”
(4) They said, “Moses allowed a certificate of divorce to be written, and to divorce her.”
(5) But Jesus said to them, “For your hardness of heart, he wrote you this commandment.
(6) But from the beginning of the creation, God made them male and female.
(7) For this cause a man will leave his father and mother, and will join to his wife,
(8) and the two will become one flesh, so that they are no longer two, but one flesh.
(9) What therefore God has joined together, let no man separate.”