Now he who was betraying Jesus gave them a sign, saying, "Whomever I shall kiss, He is the one; seize Him." And immediately he came to Jesus and said, "Hail, Rabbi!" and kissed Him. And Jesus said to him, "Friend, do what you have come for." Then they came and laid hands on Jesus and seized Him. ( Matthew 26:48-50)

And when they came to the place called The Skull, there they crucified Him and the criminals, one on the right and the other on the left. But Jesus was saying, "Father forgive them (his executioners); for they do not know what they are doing." ( Luke 23:33-34)

And the scribes and the Pharisees brought a woman caught in adultery, and having set her in the midst, they said to Him, "Teacher, this woman has been caught in adultery, in the very act. Now in the Law Moses commanded us to stone (execute) such a woman; what then do you say?" And they were saying this, testing Him, in order that they might have grounds for accusing Him. But Jesus stooped down, and with His finger wrote on the ground. But when they persisted in asking Him, He straightened up, and said to them, "He who is without sin among you, let him be the first to throw a stone at her." And again He stooped down and wrote on the ground. And when they heard it, they began to go out one by one, beginning with the older ones, and He was left alone, and the woman, where she had been, in the midst. And straightening up, Jesus said to her, "Woman, where are they? Did no one condemn you?" And she said, "No one, Lord." And Jesus said, "Neither do I condemn you; go your way; from now on sin no more." ( John 8:3-11)

Helpful links to related questions/topics

Ask Jesus - He Says God Forgives You if You Ask Forgiveness for the Guilty Forgive One Another - Jesus The Woman Caught in Adultery Did Jesus condemn sin? Can Jesus forgive really bad sins? Can Jesus forgive murder?