I was walking with a group of people during a campaign I went on with the Messenger of Allah ﷺ and I swore an oath, saying, No, by my father. A man behind me rebuked me for that and said: “Do not swear by your fathers,” I turned around and saw that it was the Messenger of Allah ﷺ.
قَالَقَالَ عُمَرُ كُنْتُ فِي رَكْبٍ أَسِيرُ فِي غَزَاةٍ مَعَ النَّبِيِّ ﷺ فَحَلَفْتُ فَقُلْتُ لَا وَأَبِي فَنَهَرَنِي رَجُلٌ مِنْ خَلْفِي وَقَالَ لَا تَحْلِفُوا بِآبَائِكُمْ فَالْتَفَتُّ فَإِذَا أَنَا بِرَسُولِ اللهِ ﷺ