'Mother's' in the Bible

And he said, They were my brothers, my mother's sons: by the life of the Lord, if you had kept them safe, I would not put you to death.

And Abimelech the son of Jerubbaal went to Shechem unto his mother's brethren, and communed with them, and with all the family of the house of his mother's father, saying,

And his mother's brethren spake of him in the ears of all the men of Shechem all these words: and their hearts inclined to follow Abimelech; for they said, He is our brother.

That he told her all his heart, and said unto her, There hath not come a rasor upon mine head; for I have been a Nazarite unto God from my mother's womb: if I be shaven, then my strength will go from me, and I shall become weak, and be like any other man.