'Son's' in the Bible

So he said, “Bring it to me, and I will eat of my son’s game, that I may bless you.” And he brought it to him, and he ate; he also brought him wine and he drank.

Then he also made savory food, and brought it to his father; and he said to his father, “Let my father arise and eat of his son’s game, that you may bless me.”

Now in the days of wheat harvest Reuben went and found 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 she said to her, “Is it a small matter for you to take my husband? And would you take my son’s mandrakes also?” So Rachel said, “Therefore he may lie with you tonight in return for your son’s mandrakes.”

When Jacob came in from the field in the evening, then Leah went out to meet him and said, “You must come in to me, for I have surely hired you with my son’s mandrakes.” So he lay with her that night.

and they sent the varicolored tunic and brought it to their father and said, “We found this; please examine it to see whether it is your son’s tunic or not.”

Then he examined it and said, “It is my son’s tunic. A wild beast has devoured him; Joseph has surely been torn to pieces!”