If anyone swears by a religion other than Islam falsely and intentionally, he is as he has said
Thābit ibn Ad-Dahhāk (may Allah be pleased with him) reported: I gave an oath of allegiance to the Messenger of Allah (may Allah's peace and blessings be upon him) under the tree. Then, the Messenger (may Allah's peace and blessings be upon him) said: "If anyone swears…

