´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."
Hadith ReferenceSunan an-Nasa'i / The Book of Oaths and Vows / Hadith: 3798
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه