John Gill Commentary Genesis 44:30

"Now therefore when I come to thy servant my father, and the lad is not with us; seeing that his life is bound up in the lad`s life;" — Genesis 44:30 (ASV)

Now therefore, when I come to your servant my father
That is, should he return to him in the land of Canaan with the rest of his brethren: and the lad [be] not with us ;

his brother Benjamin, so called here, and in the following verses, though thirty years of age and upwards, see (Genesis 43:8) ; seeing that his life is bound up in the lad's life ;

he is as closely united to him in affection, and is as dear to him as his own soul; quite wrapped up in him, and cannot live without him; should he die, he must die too; see (1 Samuel 18:1) ; so it follows: