Matthew 7:16-18

By their fruits you will know them. Are grapes gathered from thorns, or figs from thistles?

Matthew 7:20

Therefore, by their fruits you shall know them.

Matthew 12:33-34

Either make the tree good, and its fruit good; or make the tree unsound, and its fruit unsound. For by the fruit the tree is known.

Matthew 15:19

For from the heart come evil reasonings, murders, adulteries, lewd actions, thefts, false testimonies, impious words.

Treasury of Scripture Knowledge

Summary

As saith the proverb of the ancients, Wickedness proceedeth from the wicked: but mine hand shall not be upon thee.

General references

Bible References

Wickedness

Matthew 7:16
By their fruits you will know them. Are grapes gathered from thorns, or figs from thistles?
Matthew 12:33
Either make the tree good, and its fruit good; or make the tree unsound, and its fruit unsound. For by the fruit the tree is known.
Matthew 15:19
For from the heart come evil reasonings, murders, adulteries, lewd actions, thefts, false testimonies, impious words.

General references

Matthew 15:18
But those things which go out from the mouth, come from the heart; and these defile the man.