John 8:5-7
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.”