Matthew 7:16-18

You shall know them by their fruits. Do men gather grapes from thorns? or figs from thistles?

Matthew 7:20

By their fruits, therefore, you shall know them.

Matthew 12:33-34

Either make the tree good and its fruit good, or make the tree bad, and its fruit bad; for a tree is known by its fruit.

Matthew 15:19

For from the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies:

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
You shall know them by their fruits. Do men gather grapes from thorns? or figs from thistles?
Matthew 12:33
Either make the tree good and its fruit good, or make the tree bad, and its fruit bad; for a tree is known by its fruit.
Matthew 15:19
For from the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies:

General references

Matthew 15:18
But the things which proceed from the mouth come from the heart, and these defile the man.