'Son's' in the Bible

Then Isaac said, “Bring the food to me, and I will eat some of my son’s game, so that I may bless you.” He brought it to him, and he ate; and he brought him wine and he drank.

Esau also made a delicious dish [of meat] and brought it to his father and said to him, “Let my father get up and eat some of his son’s game, so that you may bless me.”

Now at the time of wheat harvest Reuben [the eldest child] went and found some mandrakes in the field, and brought them to his mother Leah. Then Rachel said to Leah, “Please give me some of your son’s mandrakes.”

But Leah answered, “Is it a small thing that you have taken my husband? Would you take away my son’s mandrakes also?” So Rachel said, “Jacob shall sleep with you tonight in exchange for your son’s mandrakes.”

When Jacob came in from the field in the evening, Leah went out to meet him and said, “You must sleep with me [tonight], for I have in fact hired you with my son’s mandrakes.” So he slept with her that night.

and they brought the multicolored tunic to their father, saying, “We have found this; please examine it and decide whether or not it is your son’s tunic.”

He recognized it and said, “It is my son’s tunic. A wild animal has devoured him; Joseph is without doubt torn in pieces!”