Matthew 7:16-18

you will know them by their fruits: do men gather grapes of thorns,

Matthew 7:20

by their fruits then shall ye know them.

Matthew 12:33-34

Either allow the tree to be good, and its fruit good; or else say the tree is corrupt, and its fruit corrrupt: for a tree is distinguished by its fruit.

Matthew 15:19

out of the heart proceed evil designs, murders, adulteries, fornications, thefts, false testimony, slanders.

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 will know them by their fruits: do men gather grapes of thorns,
Matthew 12:33
Either allow the tree to be good, and its fruit good; or else say the tree is corrupt, and its fruit corrrupt: for a tree is distinguished by its fruit.
Matthew 15:19
out of the heart proceed evil designs, murders, adulteries, fornications, thefts, false testimony, slanders.

General references

Matthew 15:18
but what proceeds out of the mouth, is deriv'd from the heart, and that defiles the man.