Musnad Ahmad 311:2

'Abd al-Razzaq narrated to us, Sufyan narrated to us, from Khalid al-Hadhdha', from Abu Qilabah, from Thabit ibn al-Dahhak al-Ansari, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever swears by a religion other than Islam, lying and intentionally, then he is as he said." And he said: "Whoever kills himself with something, Allah will punish him with it in the Fire of Hell."