'Regret' in the Bible

For John came to you in the way of righteousness, and you had no faith in him, but the tax-farmers and the loose women had faith in him: and you, when you saw it, did not even have regret for your sins, so as to have faith in him.

Then Judas, who was false to him, seeing that he was to be put to death, in his regret took back the thirty bits of silver to the chief priests and those in authority,

And they all gave reasons why they were not able to come. The first said to him, I have got a new field, and it is necessary for me to go and see it: I am full of regret that I am unable to come.

And another said, I have got some cattle, and I am going to make a test of them: I am full of regret that I am unable to come.

And if he does you wrong seven times in a day, and seven times comes to you and says, I have regret for what I have done; let him have forgiveness.

For though my letter gave you pain, I have no regret for it now, though I had before; for I see that the letter gave you pain, but only for a time.

And that when I come again, my God may put me to shame among you, and I may have grief for those who have done wrong before and have had no regret for their unclean ways, and for the evil desires of the flesh to which they have given way.

And they had no regret for putting men to death, or for their use of secret arts, or for the evil desires of the flesh, or for taking the property of others.