Commentaries:
According to the letter of the law, adultery is sexual intercourse outside of marriage, but Christ emphasizes the spirit of the law. If a man even looks at a woman to lust after her, he has committed adultery. This sin so defiles the land and its inhabitants that it must be removed. Thus, the law's penalty for adultery is death.
Martin G. Collins
The Seventh Commandment
Other Forerunner Commentary entries containing Leviticus 20:10:
Exodus 20:14
John 8:10-11
2 Corinthians 3:7