Luke 6:44
"For every tree is known by his own fruit. For of thorns men do not gather figs, nor of a bramble bush gather they grapes."
Cross References (ranked by relevance)
Matthew 12:33
Either make the tree good, and his fruit good; or else make the tree corrupt, and his fruit corrupt: for the tree is known by his fruit.
James 3:12
Can the fig tree, my brethren, bear olive berries? either a vine, figs? so can no fountain both yield salt water and fresh.
Jude 1:12
These are spots in your feasts of charity, when they feast with you, feeding themselves without fear: clouds they are without water, carried about of winds; trees whose fruit withereth, without fruit, twice dead, plucked up by the roots;