(7) باب الْحَلِفِ بِمِلَّةٍ سِوَى الإِسْلاَمِ
Thabit bin Ad-Dahhak narrated that the Messenger of Allah said:
"Whoever swears by a religion other than Islam, telling a lie, will be as he said, and whoever kills himself with something will be punished with it in the Hereafter."
Reference: Sunan an-Nasa'i 3771
In-book reference: Book 35, Hadith 11
English translation: Vol. 4, Book 35, Hadith 3802