Matthew 12:34

You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.

2 Corinthians 8:12

For if the readiness is there, it is acceptable according to what a man has, not according to what he does not have.

2 Corinthians 9:7

Each one must give just as he has purposed in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.

Treasury of Scripture Knowledge

Summary

And they came, every one whose heart stirred him up, and every one whom his spirit made willing, and they brought the LORD'S offering to the work of the tabernacle of the congregation, and for all his service, and for the holy garments.

Bible References

General references

Matthew 12:34
You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.
2 Corinthians 8:12
For if the readiness is there, it is acceptable according to what a man has, not according to what he does not have.
2 Corinthians 9:7
Each one must give just as he has purposed in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.