'Mother's' in the Bible

Besides, she really is my sister she's my father's daughter, but not my mother's daughter so she could become my wife.

And the damsel ran, and told them of her mother's house these things.

And Isaac brought her into his mother Sarah's tent, and took Rebekah, and she became his wife; and he loved her: and Isaac was comforted after his mother's death.

Let people serve thee, and nations bow down to thee: be lord over thy brethren, and let thy mother's sons bow down to thee: cursed be every one that curseth thee, and blessed be he that blesseth thee.

Arise, go to Padanaram, to the house of Bethuel thy mother's father; and take thee a wife from thence of the daughters of Laban thy mother's brother.

After Jacob had obeyed his father and mother's instructions to set out for Paddan-aram,

And it came to pass, when Jacob saw Rachel the daughter of Laban his mother's brother, and the sheep of Laban his mother's brother, that Jacob went near, and rolled the stone from the well's mouth, and watered the flock of Laban his mother's brother.

But Jacob said, “My son shall not go down [to Egypt] with you; for his brother is dead, and he alone is left [of Rachel’s children]. If any harm or accident should happen to him on the journey you are taking, then you will bring my gray hair down to Sheol (the place of the dead) in sorrow.”

And he lifted up his eyes, and saw his brother Benjamin, his mother's son, and said, Is this your younger brother, of whom ye spake unto me? And he said, God be gracious unto thee, my son.

and we answered my lord, ‘We have an elderly father and a younger brother, the child of his old age. The boy’s brother is dead. He is the only one of his mother’s sons left, and his father loves him.’