9Now Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, mocking Isaac. 10Therefore she said to Abraham, “Drive out this slave woman and her son, for the son of this slave woman shall not be an heir with my son [c]Isaac!” 11The matter [d]distressed Abraham greatly because of his son Ishmael. 12But God said to Abraham, “[e]Do not be distressed because of the boy and your slave woman; whatever Sarah tells you, listen to her, for through Isaac [f]your descendants shall be named. 13And of the son of the slave woman I will make a nation also, because he is your [g]descendant.” 14So Abraham got up early in the morning and took bread and a [h]skin of water, and gave them to Hagar, putting them on her shoulder, and gave her the boy, and sent her away. And she departed and wandered about in the wilderness of Beersheba. Abraham has to get rid of Ishmael because he is the son of Abraham and Sarah's slave woman.
1Now when Rachel saw that she had not borne Jacob any children, [a]she became jealous of her sister; and she said to Jacob, “Give me children, or else I am going to die.” 2Then Jacob’s anger burned against Rachel, and he said, “Am I in the place of God, who has withheld from you the fruit of the womb?” 3Then she said, “Here is my female slave Bilhah: have relations with her that she may give birth [b]on my knees, so that [c]by her I too may obtain a child.” 4So she gave him her slave Bilhah as a wife, and Jacob had relations with her. 5Bilhah conceived and bore Jacob a son. 6Then Rachel said, “God has [d]vindicated me, and has indeed heard my voice and has given me a son.” Therefore she named him [e]Dan. 7And Rachel’s slave Bilhah conceived again and bore Jacob a second son. 8So Rachel said, “With [f]mighty wrestling I have [g]wrestled with my sister, and I have indeed prevailed.” And she named him Naphtali.
Jacob does not get rid of Naphtali even though he is a son of Jacob and Rachel's slave woman.
What is this double standard?