Sunan an-Nasa'i 3770
It was narrated that Thabit bin Ad-Dahhak said:
"The Messenger of Allah said: 'Whoever swears by a religion other than Islam, telling a lie, will be as he said.'"
  In his narration, Qutaibah said: "Intentionally." Yazid said: "Telling a lie will be as he said, and whoever kills himself with something. Allah will punish him with it in the Fire of Hell."
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ خَالِدٍ، ح وَأَنْبَأَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ بَزِيعٍ، قَالَ حَدَّثَنَا يَزِيدُ، قَالَ حَدَّثَنَا خَالِدٌ، عَنْ أَبِي قِلاَبَةَ، عَنْ ثَابِتِ بْنِ الضَّحَّاكِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ مَنْ حَلَفَ بِمِلَّةٍ سِوَى الإِسْلاَمِ كَاذِبًا فَهُوَ كَمَا قَالَ ‏"‏ ‏.‏ قَالَ قُتَيْبَةُ فِي حَدِيثِهِ مُتَعَمِّدًا وَقَالَ يَزِيدُ ‏"‏ كَاذِبًا فَهُوَ كَمَا قَالَ وَمَنْ قَتَلَ نَفْسَهُ بِشَىْءٍ عَذَّبَهُ اللَّهُ بِهِ فِي نَارِ جَهَنَّمَ ‏"‏ ‏.‏