Musar for Sanhedrin 161:8
א"כ מאי קמ"ל יחזקאל דילמא תורה קא מהדר א"כ איבעי ליה לאהדורה כי היכי דאהדרה משה רבינו
Now, 'If he beget a son that is a robber, a shedder of blood, — this [murder] is punished by decapitation; 'and defiled his neighbour's wife', — this is adultery, punished by strangulation; 'and hath lifted up his eyes to the idols',<span class="x" onmousemove="('comment',' Ibid 12. ');"><sup>7</sup></span>
Mesilat Yesharim
For it is not only the explicit and well known deed of theft or oppression which is forbidden but rather anything which may eventually lead to such a deed and cause it is included in the prohibition. On this our sages of blessed memory said (Sanhedrin 81a): "'he did not defile the wife of his fellow' (Yechezkel 18:6) - that he did not encroach upon his fellow's trade".
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