Sunan an-Nasa'i #3764 · The Book of Agriculture

Sunan an-Nasa'iIt was narrated that Ibn 'Umar said
Sunan an-Nasa'i · Book 35 · The Book of Agriculture
Sunan an-Nasa'i · كتاب 35 · كتاب المزارعة
"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
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، عَنْ إِسْمَاعِيلَ، - وَهُوَ ابْنُ جَعْفَرٍ - قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ مَنْ كَانَ حَالِفًا فَلاَ يَحْلِفْ إِلاَّ بِاللَّهِ ‏"‏ ‏.‏ وَكَانَتْ قُرَيْشٌ تَحْلِفُ بِآبَائِهَا فَقَالَ ‏"‏ لاَ تَحْلِفُوا بِآبَائِكُمْ ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 3764In-book reference : Book 35, Hadith 4