(5) باب الْحَلِفِ بِالآبَاءِ
It was narrated from 'Umar that the Prophet said:
"Allah forbids you to swear by your forefathers." 'Umar said: "By Allah, I never swore by them again, whether saying it for myself or reporting of others." (ES)
Reference (ES): Sunan an-Nasa'i 3767 (ES)
In-book reference (ES): Book 35, Hadith 7 (ES)
English translation (ES): Vol. 4, Book 35, Hadith 3798 (ES)