It is narrated from Sayyiduna Umar (may Allah be pleased with him) that once we were on a journey with the Prophet (peace and blessings be upon him), a man swore an oath saying: «لَاوَأَبِي» Then another man said to him: Do not swear by the names of your forefathers. When I looked, it was the Prophet (peace and blessings be upon him).
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 116
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف، رواية سماك عن عكرمة فيها اضطراب، خ: 6647، م: 1646