Yahya bin Abi Ishaq said: “A man from Banu Ghifar told me, in the gathering of Salim bin ‘Abdullah, Salim bin ‘Abdullah said: ‘I heard ‘Abdullah — that is, Ibn ‘Umar — say: “The Messenger of Allah صلی اللہ علیہ وآلہ وسلم said: ‘Allah forbids you to swear by your forefathers.” (Sahih)