Matthew 12:34

12:34 Offspring of vipers! How are you able to say anything good, since you are evil? For the mouth speaks from what fills the heart.

Matthew 12:39

12:39 But he answered them, ¹  “An evil and adulterous generation asks for a sign, but no sign will be given to it except the sign of the prophet Jonah.

[12:39]  ¹ tn Grk “But answering, he said to them.” This construction is somewhat redundant in English and has been simplified in the translation.