Saw it somewhere

"The zina of the eyes is the gaze (at that which is unlawful, eg. Nudity); the zina of the ears is to listen (to talks of nudity which excites the carnal desire); the zina of the tongue is to speak (what is evil); the zina of the hand is to touch (the female which is unlawful to you); the zina of the feet is to walk (towards immorality); the zina of the heart is to desire (what is unlawful), and it is the private parts which either commits or shuns the actual act of fornication."

Muslim 4/1397, no. 6421, 6422

Hadith

The Prophet (sal Allahu alayhi wa sallam) said: “Allah, Blessed and Exalted is He, says, ‘O son of Adam, as long as you call on Me, I shall forgive you of what you have done, and think nothing of it. O son of Adam, even if your sins were to reach up to the clouds in the sky, and then you were to ask for My forgiveness, I would forgive you and think nothing of it. O son of Adam, even if you were to come to Me with sins nearly as great as the earth, and then you were to meet Me after death, not worshipping anything besides Me, I would bring you forgiveness nearly as great as the earth.’”

[Tirmidhi]