John 8:3-7

3 The teachers of the law and the Pharisees brought in a woman caught in adultery. They made her stand before the group

4 and said to Jesus, “Teacher, this woman was caught in the act of adultery.

5 In the Law Moses commanded us to stone such women. Now what do you say?”

6 They were using this question as a trap, in order to have a basis for accusing him.
But Jesus bent down and started to write on the ground with his finger.

7 When they kept on questioning him, he straightened up and said to them, “If any one of you is without sin, let him be the first to throw a stone at her.”