But let’s know for now what did Moses command? Leviticus 20:10 says:

10“If a man commits adultery with the wife of his neighbor, both the adulterer and the adulteress shall surely be put to death.

This is 'just' one of the many times they were trying to trap Jesus. 

"Jesus says to the woman, “Neither do I condemn you.” Sinless Jesus did not condemn the adulterous woman. This is grace! Amazing grace!

And since the woman had been graced by Jesus, she can now live triumphantly over sin. She had a life-changing encounter with the Savior of the world, and she can go and sin no more!"