When YASHAYAH CHRIST was speaking HE was speaking of HIMSELF.
But At the same time they were also convicted in themselves because they knew they were sinners.
Christ was the only one among them that was without sin!
And only HE could bring judgment!
Therefore HE gave GRACE to the woman!
According to the letter of the law she should've been judge right there!
As the scripture says!
John 8:7-9
[7]So when they continued asking him, he lifted up himself, and said unto them, He that is without sin among you, let him first cast a stone at her.
[8]And again he stooped down, and wrote on the ground.
[9]And they which heard it, being convicted by their own conscience, went out one by one, beginning at the eldest, even unto the last: and Jesus was left alone, and the woman standing in the midst.
John 8:10-11
[10]When Jesus had lifted up himself, and saw none but the woman, he said unto her, Woman, where are those thine accusers? hath no man condemned thee?
[11]She said, No man, Lord. And Jesus said unto her, Neither do I condemn thee: go, and sin no more.