Matthew 7:16-18

From their fruits ye shall recognize them. Do men gather grapes from thorns, or figs from thistles?

Matthew 7:20

So then, from their fruits ye shall know them.

Matthew 12:33-34

Either make the tree good and its fruit good, or make the tree worthless and its fruit worthless; for from the fruit the tree is known.

Matthew 15:19

For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false-witnessings, 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
From their fruits ye shall recognize them. 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 worthless and its fruit worthless; for from the fruit the tree is known.
Matthew 15:19
For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false-witnessings, blasphemies:

General references

Matthew 15:18
But the things that proceed out of the mouth come forth out of the heart; and these defile the man.