It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Your oath is valid according to the intention in which your companion (for whom the oath is being sworn) accepts you as truthful."

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: "Swearing an oath is either a sin (of breaking one's word) or (a cause of) regret and remorse." Imam al-Hakim says that for a long period of my life I assumed that this narrator Bashshar was the brother of Mis'ar, but I could not confirm it; and this statement is authentic as a saying of Sayyiduna Ibn Umar (may Allah be pleased with them both).

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he said: "An oath is nothing but a burden of sin or a cause of regret."