And the Noble Prophet (peace and blessings be upon him) said: Allah has decreed for every human being his share of adultery, which he will inevitably encounter. The adultery of the eyes is looking, the adultery of the tongue is speaking. A person’s soul desires and wishes, while the private parts confirm or deny it.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8215