Exodus 22, 20-26
'You will not molest or oppress aliens, for you yourselves were once aliens in Egypt.
You will not ill-treat widows or orphans;
if you ill-treat them in any way and they make an appeal to me for help, I shall certainly hear their appeal,
my anger will be roused and I shall put you to the sword; then your own wives will be widows and your own children orphans.
'If you lend money to any of my people, to anyone poor among you, you will not play the usurer with him: you will not demand interest from him.
'If you take someone's cloak in pledge, you will return it to him at sunset.
It is all the covering he has; it is the cloak he wraps his body in; what else will he sleep in? If he appeals to me, I shall listen. At least with me he will find compassion!