[Machine] The Messenger of Allah ﷺ caught up with Umar while he was on a journey, taking an oath by his father. When the Messenger of Allah ﷺ heard this, he said, "Hold on, for Allah has prohibited you from swearing by your fathers. Whoever swears, let him swear by Allah or remain silent."
رَسُولَ اللهِ ﷺ أَدْرَكَ عُمَرَ ؓ وَهُوَ فِي رَكْبٍ وَهُوَ يَحْلِفُ بِأَبِيهِ فَلَمَّا سَمِعَهُ رَسُولُ اللهِ ﷺ قَالَ مَهْلًا فَإِنَّ اللهَ قَدْ نَهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ مَنْ حَلَفَ فَلْيَحْلِفْ بِاللهِ أَوْ لِيَسْكُتْ