thy son's
Genesis 37:3
Now Israel loved Joseph more than all his children, because he was the son of his old age; and he made him a coat of many colors.
Genesis 44:20-23
20
And we said unto my lord, `We have a father, an old man, and a child of his old age, a little one; and his brother is dead, and he alone is left of his mother, and his father loveth him.'
21
And thou saidst unto thy servants, `Bring him down unto me, that I may set mine eyes upon him.'
22
And we said unto my lord, `The lad cannot leave his father; for if he should leave his father, his father would die.'
23
And thou saidst unto thy servants, `Unless your youngest brother come down with you, ye shall see my face no more.'
Luke 15:30
But as soon as this thy son was come who hath devoured thy living with harlots, thou hast killed for him the fatted calf.'