It is narrated from Sayyiduna Abdullah bin Umar, may Allah be pleased with them both, that the Messenger of Allah, peace and blessings be upon him, said: Whoever takes an oath but makes an exception along with it, then he has the choice; if he wishes, he may enforce his oath, and if he wishes, he may not fulfill the requirement of the oath. This will not break his oath, or he said: There is no harm in it.