Do not swear by Tawāghi (idols) nor by your fathers

The Prophet (may Allah's peace and blessings be upon him) forbids us from swearing by Tawāghi, the plural of Tāghiyah, and these are the idols that the polytheists used to worship apart from Allah and they were the cause of their wrongdoing and Kufr (disbelief). He (may Allah's peace and blessings be upon him) also forbids us from swearing by our fathers. It was a common practice among the Arabs in Jāhiliyyah to swear by their fathers out of pride and exaltation.