It is narrated from Sayyiduna Sa’d bin Abi Waqqas (may Allah be pleased with him) that once we were performing Tawaf with the Prophet (peace and blessings of Allah be upon him). Some of us completed seven circuits in Tawaf, some eight, and some even more than that, but the Prophet (peace and blessings of Allah be upon him) said: "There is no harm."
Hadith Referenceمسند احمد / مسند باقي العشرة المبشرين بالجنة / 1603
Hadith Gradingحکم دارالسلام:إسناده ضعيف لانقطاعه، مجاهد لم يسمع من سعد. والحجاج بن أرطاة مدلس وقد عنعن.