his father would die
Genesis 44:30
'And now, at my coming in unto thy servant my father, and the youth not with us (and his soul is bound up in his soul),
Genesis 42:38
and he saith, 'My son doth not go down with you, for his brother [is] dead, and he by himself is left; when mischief hath met him in the way in which ye go, then ye have brought down my grey hairs in sorrow to sheol.'