Proverbs 28:8

Whoso increaseth his riches by vantage and winning, let him gather them to help the poor withal.

Leviticus 25:36

And thou shalt take none usury of him, nor yet vantage. But shalt fear thy God, that thy brother may live with thee.

Proverbs 13:22

which their children's children shall have in possession - for the riches of the sinner is laid up for the just.

Exodus 22:25

If thou lend money to any of my people that is poor by thee, thou shalt not be as an usurer unto him, neither shalt oppress him with usury.

Proverbs 14:31

He that doth a poor man wrong, blasphemeth his maker; but whoso hath pity of the poor, doth honour unto God.

2 Samuel 12:6

and shall restore the lamb fourfold, because he did this thing and because he had no pity."

Job 27:16-17

Though he have as much money as the dust of the earth, and raiment as ready as the clay,

Proverbs 19:7

As for the poor, he is hated among all his brethren; yea, his own friends forsake him, and he that giveth credence unto words, getteth nothing.

Ecclesiastes 2:26

He giveth unto man, what it pleaseth him; whether it be wisdom, understanding, or gladness. But unto the sinner he giveth weariness and sorrow, that he may gather and heap together the thing, that afterward shall be given unto him whom it pleaseth God. This is now a vain thing, yea a very disquietness and vexation of mind.

Ezekiel 18:8

he lendeth nothing upon usury; he taketh nothing over; he withdraweth his hand from doing wrong; he handleth faithfully betwixt man and man;

Ezekiel 18:13

he lendeth upon usury, and taketh moreover. Shall this man live? He shall not live. Seeing he hath done all these abominations, he shall die: his blood shall be upon him.

Ezekiel 18:17

he opresseth not the poor; he receiveth no usury, nor anything over; he keepeth my laws, and walketh in my commandments: this man shall not die in his father's sin, but shall live without fail.

Treasury of Scripture Knowledge

Summary

He that by usury and unjust gain increaseth his substance, he shall gather it for him that will pity the poor.

Bible References

That by

Proverbs 13:22
which their children's children shall have in possession - for the riches of the sinner is laid up for the just.
Job 27:16
Though he have as much money as the dust of the earth, and raiment as ready as the clay,
Ecclesiastes 2:26
He giveth unto man, what it pleaseth him; whether it be wisdom, understanding, or gladness. But unto the sinner he giveth weariness and sorrow, that he may gather and heap together the thing, that afterward shall be given unto him whom it pleaseth God. This is now a vain thing, yea a very disquietness and vexation of mind.

Unjust gain

Leviticus 25:36
And thou shalt take none usury of him, nor yet vantage. But shalt fear thy God, that thy brother may live with thee.
Ezekiel 18:8
he lendeth nothing upon usury; he taketh nothing over; he withdraweth his hand from doing wrong; he handleth faithfully betwixt man and man;

Pity

Proverbs 19:7
As for the poor, he is hated among all his brethren; yea, his own friends forsake him, and he that giveth credence unto words, getteth nothing.
2 Samuel 12:6
and shall restore the lamb fourfold, because he did this thing and because he had no pity."

General references

Exodus 22:25
If thou lend money to any of my people that is poor by thee, thou shalt not be as an usurer unto him, neither shalt oppress him with usury.
Leviticus 11:34
All manner meat that is eaten, if any such water come upon it, it shall be unclean. And all manner drink that is drunk in all manner such vessels, shall be unclean.
Leviticus 25:14
"'When thou sellest ought unto thy neighbour or buyest of thy neighbour's hand, ye shall not oppress one another: