'Mother's' in the Bible

For they have been given to me from among the children of Israel; in place of every mother's first son, the first to come to birth in Israel, I have taken them for myself.

For every mother's first son among the children of Israel is mine, the first male birth of man or beast: on the day when I sent death on all the first sons in the land of Egypt, I made them mine.

Let her not be as one dead, of whom the flesh is half consumed when he cometh out of his mother's womb.