John 8:6-8

6This they said, testing Him, that they might have something of which to accuse Him. But Jesus stooped down and wrote on the ground with His finger, as though He did not hear.

7So when they continued asking Him, He raised Himself up and said to them, “He who is without sin among you, let him throw a stone at her first.”

8And again He stooped down and wrote on the ground.