«إن الله تعالى كتب على ابن آدم حظه من الزنا أدرك ذلك لا محالة فزنا العين النظر وزنا اللسان المنطق والنفس تمنى وتشتهي والفرج يصدق ذلك أو يكذبه»
The Prophet (peace and blessings be upon him) said:
"Indeed, Allah Almighty has written for the son of Adam his share of zina (fornication), which he will inevitably attain. The zina of the eye is looking (with an unlawful gaze), and the zina of the tongue is (obscene) speech. The self wishes and desires, and the private part confirms it or denies it."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 1797