Lying

Lying is among the sins of the heart. It is to utter false information while knowing that what one is saying is not the truth. It is sinful (haram) whether done seriously or jokingly.

The Prophet, sallallahu ^alayhi wa sallam, said:

لاَ يَصْلُحُ الْكَذِبُ فِي جِدٍّ وَلاَ فِي هَزْلٍ

La yasluhul-kadhibu fi jiddiw wala fi hazl.

Which means: “Lying is not good, whether in seriousness or joking.” (Related by al-Bayhaqiyy.)

The Prophet, sallallahu ^alayhi wa sallam, also said:

إِيَّاكَ وَالْكَذِبَ فَإِنَّ الْكَذِبَ يَهْدِي إِلَى الْفُجُورِ وَإِنَّ الْفُجُورَ يَهْدِي إِلَى النَّارِ، وَلاَ يَزَالُ الْعَبْدُ يَكْذِبُ وَيَتَحَرَّى الْكَذِبَ حَتَّى يُكْتَبَ عِنْدَ اللهِ كَذَّاباً