NET
34 Offspring of vipers! How are you able to say anything good, since you are evil? For the mouth speaks from what fills the heart.
Darby
34 Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.
KJV
34 “O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.”