Narrated Thabit bin Adh-Dahhak:
That the Messenger of Allah (peace be upon him) said: “Whoever swears by a religion other than Islam while lying, then he is as he said.”
Jami` at-Tirmidhi, Vo. 3, Book 20, Hadith 22

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Narrated Thabit bin Adh-Dahhak:
That the Messenger of Allah (peace be upon him) said: “Whoever swears by a religion other than Islam while lying, then he is as he said.”
Jami` at-Tirmidhi, Vo. 3, Book 20, Hadith 22