بِسْمِ اللهِ الرَّحْمنِ الرَّحِيمِ
The Prophet (صلى الله عليه وسلم) said,
"Allah has written the very portion of Zina which a man will indulge in. There will be no escape from it. The Zina of the eye is the (lustful) look, the Zina of the ears is listening to (voluptuous songs or talk), the Zina of the tongue is (the licentious) speech, the Zina of the hand is the (lustful) grip, the Zina of the feet is walking (to the place where he intends to commit Zina), the heart yearns and desires and the private parts approve all that or disapprove it.
[Al-Bukhari and Muslim]
This is the wording in Muslim; Al-Bukahri wording is a bit short.
"Verily, the hearing, and the sight, and the heart of each of those ones will be questioned (by Allah)." (17:36)
May Allah swt save us all from Zina.