Oaths and Vows
Bukhari :: Book 8 :: Volume 78 :: Hadith 647
Narrated Thabit bin Ad-Dahhak:
The Prophet said, "Whoever swears by a religion other than Islam, is, as he says; and whoever commits suicide with something, will be punished with the same thing in the (Hell) Fire; and cursing a believer is like murdering him; and whoever accuses a believer of disbelief, then it is as if he had killed him."
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