New International Version
You brood of vipers, how can you who are evil say anything good? For the mouth speaks what the heart is full of.

American Standard Version
Ye offspring of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.

Berean Study Bible
You brood of vipers, how can you who are evil say anything good? For out of the overflow of the heart, the mouth speaks.

Douay-Rheims Bible
O generation of vipers, how can you speak good things, whereas you are evil? for out of the abundance of the heart the mouth speaketh.

English Revised Version
Ye offspring of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.

King James Bible
O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.

World English Bible
You offspring of vipers, how can you, being evil, speak good things? For out of the abundance of the heart, the mouth speaks.

Young's Literal Translation
'Brood of vipers! how are ye able to speak good things -- being evil? for out of the abundance of the heart doth the mouth speak.

Matthew 12:34 Additional Translations ...