عن بريدة رضي الله عنه : أن رسول الله صلى الله عليه وسلم قال: «من حَلَفَ بالأمَانة فليس مِنَّا».
[صحيح] - [رواه أبو داود وأحمد]
المزيــد ...

Buraydah (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said: "He who swears by the 'Amānah' (religious obligations) is not one of us."
Sahih/Authentic. - [Abu Dawood]

Explanation

This Hadīth warns against swearing by the 'Amānah', because swearing by other than Allah is polytheism (associating partners with Allah) as mentioned in another Hadīth: "Whoever swears by other than Allah has disbelieved or committed polytheism." 'Polytheism' here means minor polytheism, because the texts indicate that merely swearing by other than Allah does not take a Muslim out of the fold of Islam, except if the one who swears believes that the thing he is swearing by has the same status of Allah, the Almighty, in terms of glorification and worship. If this is the case, then it is major polytheism. 'Amānah' here is a collective term referring to the acts of worship that Allah, the Almighty, has ordained, such as prayer, fasting, Hajj and other religious obligations. If someone says: I swear by my prayer, or by my fasting, or by my Hajj, or generalizes by saying: by Allah's Amānah, then all of this is forbidden, because a Muslim is commanded to swear by Allah, the Almighty, or by one of Allah's attributes. Amānah is not an attribute of Allah; rather, it is one of His commands and ordained religious duties.

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