Proverbs 14:31

He who is hard on the poor puts shame on his Maker; but he who has mercy on those who are in need gives him honour.

Proverbs 17:5

Whoever makes sport of the poor puts shame on his Maker; and he who is glad because of trouble will not go free from punishment.

Proverbs 22:2

The man of wealth and the poor man come face to face: the Lord is the maker of them all.

Proverbs 19:17

He who has pity on the poor gives to the Lord, and the Lord will give him his reward.

Job 31:13-16

If I did wrong in the cause of my man-servant, or my woman-servant, when they went to law with me;

Psalm 12:5

Because of the crushing of the poor and the weeping of those in need, now will I come to his help, says the Lord; I will give him the salvation which he is desiring.

Proverbs 14:21

He who has no respect for his neighbour is a sinner, but he who has pity for the poor is happy.

Proverbs 22:16

He who is cruel to the poor for the purpose of increasing his profit, and he who gives to the man of wealth, will only come to be in need.

Proverbs 22:22-23

Do not take away the property of the poor man because he is poor, or be cruel to the crushed ones when they come before the judge:

Ecclesiastes 5:8

If you see the poor under a cruel yoke, and law and right being violently overturned in a country, be not surprised, because one authority is keeping watch on another and there are higher than they.

Matthew 25:40-46

And the King will make answer and say to them, Truly I say to you, Because you did it to the least of these my brothers, you did it to me.

John 12:8

The poor you have ever with you, but me you have not for ever.

2 Corinthians 8:7-9

And that as you are full of every good thing, of faith, of the word, of knowledge, of a ready mind, and of love to us, so you may be full of this grace in the same way.

1 John 3:17-21

But if a man has this world's goods, and sees that his brother is in need, and keeps his heart shut against his brother, how is it possible for the love of God to be in him?

1 John 4:21

And this is the word which we have from him, that he who has love for God is to have the same love for his brother.

Treasury of Scripture Knowledge

Summary

He that oppresseth the poor reproacheth his Maker: but he that honoureth him hath mercy on the poor.

Bible References

That oppresseth

Proverbs 17:5
Whoever makes sport of the poor puts shame on his Maker; and he who is glad because of trouble will not go free from punishment.
Proverbs 22:2
The man of wealth and the poor man come face to face: the Lord is the maker of them all.
Job 31:13
If I did wrong in the cause of my man-servant, or my woman-servant, when they went to law with me;
Psalm 12:5
Because of the crushing of the poor and the weeping of those in need, now will I come to his help, says the Lord; I will give him the salvation which he is desiring.
Ecclesiastes 5:8
If you see the poor under a cruel yoke, and law and right being violently overturned in a country, be not surprised, because one authority is keeping watch on another and there are higher than they.
Matthew 25:40
And the King will make answer and say to them, Truly I say to you, Because you did it to the least of these my brothers, you did it to me.

But

Proverbs 14:21
He who has no respect for his neighbour is a sinner, but he who has pity for the poor is happy.
Proverbs 19:17
He who has pity on the poor gives to the Lord, and the Lord will give him his reward.
Matthew 25:40
And the King will make answer and say to them, Truly I say to you, Because you did it to the least of these my brothers, you did it to me.
John 12:8
The poor you have ever with you, but me you have not for ever.
2 Corinthians 8:7
And that as you are full of every good thing, of faith, of the word, of knowledge, of a ready mind, and of love to us, so you may be full of this grace in the same way.
1 John 3:17
But if a man has this world's goods, and sees that his brother is in need, and keeps his heart shut against his brother, how is it possible for the love of God to be in him?
1 John 4:21
And this is the word which we have from him, that he who has love for God is to have the same love for his brother.

General references

Leviticus 25:14
And in the business of trading goods for money, do no wrong to one another.
Deuteronomy 24:14
Do not be hard on a servant who is poor and in need, if he is one of your countrymen or a man from another nation living with you in your land.
Proverbs 3:9
Give honour to the Lord with your wealth, and with the first-fruits of all your increase:

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain