ذِكْرُ الْعِلَّةِ الَّتِي مِنْ أَجْلِهَا زَجَرَ عَنِ الْحَلِفِ بِالْآبَاءِ
"The Messenger of Allah said: 'Whoever swears, let him not swear by anything other than Allah.'" The Quraish used to swear by their forefathers, and so he said: "Do not swear by your forefathers." (Using translation from Nasāʾī 3764)
قَالَ رَسُولُ اللَّهِ ﷺ «مَنْ كَانَ حَالِفًا فَلَا يَحْلِفُ إِلَّا بِاللَّهِ» وَكَانَتْ قُرَيْشٌ تَحْلِفُ بِآبَائِهَا فَقَالَ «لَا تَحْلِفُوا بِآبَائِكُمْ»