Sahih Bukhari | Volume 5 | Hadith Number 177
Narrated by 'Umar
The Prophet said, "If anybody has to take an oath, he should swear only by Allah." The
people of Quraish used to swear by their fathers, but the Prophet said, "Do not swear by your fathers."
people of Quraish used to swear by their fathers, but the Prophet said, "Do not swear by your fathers."