Prohibition of the Treachery and Breaking one's Covenant
Ibn Mas`ud, Ibn `Umar and Anas (May Allah be pleased with them) said: The Prophet (PBUH) said, "For every one who breaks his covenant, there will be a (huge) flag on the Day of Resurrection and it will be said: `This flag proclaims a breach of covenant by so-and-so."
[Al-Bukhari and Muslim].
"Ghadr'" means breach of oath and its disregard. On the Day of Judgement, a person with such a quality will be given a (huge) flag which will be a sign of his lack of sincerity to his words.
277/1585 - Riyad Us-Saliheen (Gardens of the Righteous)
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