Matthew 12:36-37

36 But I say to you that for every idle word men may speak, they will give account of it in the day of judgment.
37 For by your words you will be justified, and by your words you will be condemned."

Matthew 12:36-37 In-Context

34 Brood of vipers! How can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.
35 A good man out of the good treasure of his heart brings forth good things, and an evil man out of the evil treasure brings forth evil things.
36 But I say to you that for every idle word men may speak, they will give account of it in the day of judgment.
37 For by your words you will be justified, and by your words you will be condemned."
38 Then some of the scribes and Pharisees answered, saying, "Teacher, we want to see a sign from You."
39 But He answered and said to them, "An evil and adulterous generation seeks after a sign, and no sign will be given to it except the sign of the prophet Jonah.