عَنْ اِبْنِ عُمَرَ رَضِيَ اَللَّهُ عَنْهُمَا
«عَنْ رَسُولِ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ أَدْرَكَ عُمَرَ بْنَ اَلْخَطَّابِ فِي رَكْبٍ، وَعُمَرَ يَحْلِفُ بِأَبِيهِ، فَنَادَاهُمْ رَسُولُ اَللَّهِ (صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ) «أَلَا إِنَّ اَللَّهَ يَنْهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ، فَمَنْ كَانَ حَالِفاً فَلْيَحْلِفْ بَِاللَّهِ، أَوْ لِيَصْمُتْ»
The Messenger of Allah (sallallahu alayhi wa sallam) overtook Umar ibn al-Khattab when he was with a party of riders of about ten and Umar was swearing by his father. The Messenger of Allah (sallallahu alayhi wa sallam) called them and said, “Verily! Allah forbids you from swearing by your fathers. Therefore, if anyone swears, he must swear by Allah or keep silent.”
Bulugh al-Maram 1556, Book 13, Oaths and Vows, Hadith 1. 1 min read