Albert Barnes Commentary Isaiah 58:7

"Is it not to deal thy bread to the hungry, and that thou bring the poor that are cast out to thy house? when thou seest the naked, that thou cover him; and that thou hide not thyself from thine own flesh?" — Isaiah 58:7 (ASV)

Is it not to deal your bread to the hungry? - The word rendered ‘deal’ (פרס pâras), means to divide, to distribute. The idea is that we are to apportion among the poor what will be necessary for their support, as a father does for his children. This is everywhere enjoined in the Bible and was especially regarded among people in ancient Eastern cultures as an indispensable duty of religion. Thus Job beautifully speaks of his own practice (Job 31:16–22):

If I have withheld the poor from his desire,
Or have caused the eyes of the widow to fail;
Or have eaten my morsel myself alone,
And the fatherless hath not eaten thereof;
If I have seen any perish for want of clothing,
Or any poor without covering; - ...
Then let mine arm fall from my shoulder blade,
And mine arm be broken from the bone.

And that you bring the poor that are cast out to your house - The margin reads, ‘Afflicted.’ Hospitality to all, and especially to the friendless and the stranger, was one of the cardinal virtues in ancient Eastern moral codes. Lowth renders this, ‘The wandering poor.’

When you see the naked ... - This duty is also plain and is everywhere enjoined in the Bible .

And that you do not hide yourself from your own flesh - That is, from your own kindred or relations who are dependent on you. Compare to Genesis 29:14 and Genesis 37:27, where the word ‘flesh’ is used to denote near relations—relations as intimate and dear as if they were a part of our own flesh and blood (Genesis 2:23).

To hide oneself from them may denote either, first, to be ashamed of them on account of their poverty or humble rank in life; or, secondly, to withhold from them the necessary supply for their needs. Religion requires us to treat all our kindred, whatever their rank may be, with kindness and affection, and enjoins on us the duty of providing for the needs of those poor relatives whom God’s providence has made dependent on us.