Deuteronomy 15:10

You shall generously give to him, and your heart shall not be grieved when you give to him, because for this thing the Lord your God will bless you in all your work and in all your undertakings.

Deuteronomy 14:29

The Levite, because he has no portion or inheritance among you, and the alien, the orphan and the widow who are in your town, shall come and eat and be satisfied, in order that the Lord your God may bless you in all the work of your hand which you do.

Deuteronomy 24:19

When you reap your harvest in your field and have forgotten a sheaf in the field, you shall not go back to get it; it shall be for the alien, for the orphan, and for the widow, in order that the Lord your God may bless you in all the work of your hands.

Proverbs 22:9

He who is generous will be blessed,
For he gives some of his food to the poor.

Deuteronomy 14:19

And all the teeming life with wings are unclean to you; they shall not be eaten.

Deuteronomy 15:4

However, there will be no poor among you, since the Lord will surely bless you in the land which the Lord your God is giving you as an inheritance to possess,

Psalm 41:1-2

For the choir director. A Psalm of David.
How blessed is he who considers the helpless;
The Lord will deliver him in a day of trouble.

Proverbs 11:24-25

There is one who scatters, and yet increases all the more,
And there is one who withholds what is justly due, and yet it results only in want.

Isaiah 32:8

But the noble man devises noble plans;
And by noble plans he stands.

Isaiah 58:10

And if you give yourself to the hungry
And satisfy the desire of the afflicted,
Then your light will rise in darkness
And your gloom will become like midday.

Matthew 25:40

The King will answer and say to them, ‘Truly I say to you, to the extent that you did it to one of these brothers of Mine, even the least of them, you did it to Me.’

Acts 20:35

In everything I showed you that by working hard in this manner you must help the weak and remember the words of the Lord Jesus, that He Himself said, ‘It is more blessed to give than to receive.’

Romans 12:8

or he who exhorts, in his exhortation; he who gives, with liberality; he who leads, with diligence; he who shows mercy, with cheerfulness.

2 Corinthians 9:5-11

So I thought it necessary to urge the brethren that they would go on ahead to you and arrange beforehand your previously promised bountiful gift, so that the same would be ready as a bountiful gift and not affected by covetousness.

Philippians 4:18-19

But I have received everything in full and have an abundance; I am amply supplied, having received from Epaphroditus what you have sent, a fragrant aroma, an acceptable sacrifice, well-pleasing to God.

1 Timothy 6:18-19

Instruct them to do good, to be rich in good works, to be generous and ready to share,

Hebrews 13:16

And do not neglect doing good and sharing, for with such sacrifices God is pleased.

1 Peter 4:11

Whoever speaks, is to do so as one who is speaking the utterances of God; whoever serves is to do so as one who is serving by the strength which God supplies; so that in all things God may be glorified through Jesus Christ, to whom belongs the glory and dominion forever and ever. Amen.

Treasury of Scripture Knowledge

Summary

Thou shalt surely give him, and thine heart shall not be grieved when thou givest unto him: because that for this thing the LORD thy God shall bless thee in all thy works, and in all that thou puttest thine hand unto.

General references

Bible References

Thine heart

Matthew 25:40
The King will answer and say to them, ‘Truly I say to you, to the extent that you did it to one of these brothers of Mine, even the least of them, you did it to Me.’
Acts 20:35
In everything I showed you that by working hard in this manner you must help the weak and remember the words of the Lord Jesus, that He Himself said, ‘It is more blessed to give than to receive.’
Romans 12:8
or he who exhorts, in his exhortation; he who gives, with liberality; he who leads, with diligence; he who shows mercy, with cheerfulness.
2 Corinthians 9:5
So I thought it necessary to urge the brethren that they would go on ahead to you and arrange beforehand your previously promised bountiful gift, so that the same would be ready as a bountiful gift and not affected by covetousness.
1 Timothy 6:18
Instruct them to do good, to be rich in good works, to be generous and ready to share,
1 Peter 4:11
Whoever speaks, is to do so as one who is speaking the utterances of God; whoever serves is to do so as one who is serving by the strength which God supplies; so that in all things God may be glorified through Jesus Christ, to whom belongs the glory and dominion forever and ever. Amen.

Because

Deuteronomy 15:4
However, there will be no poor among you, since the Lord will surely bless you in the land which the Lord your God is giving you as an inheritance to possess,
Deuteronomy 14:19
And all the teeming life with wings are unclean to you; they shall not be eaten.
Deuteronomy 24:19
When you reap your harvest in your field and have forgotten a sheaf in the field, you shall not go back to get it; it shall be for the alien, for the orphan, and for the widow, in order that the Lord your God may bless you in all the work of your hands.
Psalm 41:1
For the choir director. A Psalm of David.
How blessed is he who considers the helpless;
The Lord will deliver him in a day of trouble.
Proverbs 11:24
There is one who scatters, and yet increases all the more,
And there is one who withholds what is justly due, and yet it results only in want.
Proverbs 22:9
He who is generous will be blessed,
For he gives some of his food to the poor.
Isaiah 32:8
But the noble man devises noble plans;
And by noble plans he stands.
Isaiah 58:10
And if you give yourself to the hungry
And satisfy the desire of the afflicted,
Then your light will rise in darkness
And your gloom will become like midday.
2 Corinthians 9:8
And God is able to make all grace abound to you, so that always having all sufficiency in everything, you may have an abundance for every good deed;
Philippians 4:18
But I have received everything in full and have an abundance; I am amply supplied, having received from Epaphroditus what you have sent, a fragrant aroma, an acceptable sacrifice, well-pleasing to God.
Hebrews 13:16
And do not neglect doing good and sharing, for with such sacrifices God is pleased.

General references

Luke 6:34
If you lend to those from whom you expect to receive, what credit is that to you? Even sinners lend to sinners in order to receive back the same amount.