Matthew 25:40

And the King will answer them and say, 'Truly I tell you, since you did all this for one of my least [significant] brothers, you did it for me.'

Acts 20:35

I have demonstrated before you a [good] example in all [these] things, so that you [too] will work hard to help those who are [physically] weak. [Also] remember the words of the Lord Jesus who Himself said, 'It is a greater blessing [for you] to give [to people's needs] than to receive [help yourselves].' "

Romans 12:8

Or, if our gift is encouraging others, we should devote ourselves to encouraging. Or, if our gift is sharing with others, we should do so generously. Or, if our gift is leading others, we should do so diligently. Or, if our gift is showing caring concern for others, we should do it cheerfully.

2 Corinthians 9:5-11

So, I thought it necessary to urge the brothers [See verse 3] to visit you ahead of time and arrange beforehand for your previously promised generous gift. Then it will be ready [when I arrive] as a generously given gift and not as something given grudgingly.

Philippians 4:18-19

But I have everything [I need], and in abundance; I am fully supplied, having received from Epaphroditus the gifts that you sent, [which are like] a fragrant-smelling sacrifice, acceptable and very pleasing to God.

1 Timothy 6:18-19

[Urge them] to do what is good, to be rich in [the practice of] good deeds, to be generous and willing to share [with others].

Hebrews 13:16

But do not forget to do good deeds and share [with others], for God is very pleased with such "sacrifices."

1 Peter 4:11

If someone's gift is speaking, he should [be sure to] say only what God wants him to. If a person's gift is serving, he should do so by the strength provided by God [who supplies all such gifts]. This is so that, in using all gifts, God may be honored through Jesus Christ, to whom belongs honor and power forever and ever. May it be so.

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
And the King will answer them and say, 'Truly I tell you, since you did all this for one of my least [significant] brothers, you did it for me.'
Acts 20:35
I have demonstrated before you a [good] example in all [these] things, so that you [too] will work hard to help those who are [physically] weak. [Also] remember the words of the Lord Jesus who Himself said, 'It is a greater blessing [for you] to give [to people's needs] than to receive [help yourselves].' "
Romans 12:8
Or, if our gift is encouraging others, we should devote ourselves to encouraging. Or, if our gift is sharing with others, we should do so generously. Or, if our gift is leading others, we should do so diligently. Or, if our gift is showing caring concern for others, we should do it cheerfully.
2 Corinthians 9:5
So, I thought it necessary to urge the brothers [See verse 3] to visit you ahead of time and arrange beforehand for your previously promised generous gift. Then it will be ready [when I arrive] as a generously given gift and not as something given grudgingly.
1 Timothy 6:18
[Urge them] to do what is good, to be rich in [the practice of] good deeds, to be generous and willing to share [with others].
1 Peter 4:11
If someone's gift is speaking, he should [be sure to] say only what God wants him to. If a person's gift is serving, he should do so by the strength provided by God [who supplies all such gifts]. This is so that, in using all gifts, God may be honored through Jesus Christ, to whom belongs honor and power forever and ever. May it be so.

Because

2 Corinthians 9:8
And God is able to provide you with abundant gifts, so that you will always have plenty of everything, and that you will also have plenty for doing every good deed.
Philippians 4:18
But I have everything [I need], and in abundance; I am fully supplied, having received from Epaphroditus the gifts that you sent, [which are like] a fragrant-smelling sacrifice, acceptable and very pleasing to God.
Hebrews 13:16
But do not forget to do good deeds and share [with others], for God is very pleased with such "sacrifices."

General references

Luke 6:34
And if you lend something [only] to those people from whom you expect to have it returned, what thanks do you deserve for doing that? Even worldly people lend to worldly people expecting to get the same things back.