Hadith 8:721
Abu Bakr narrated to us, he said: Abda bin Sulayman narrated to us, from Abd al-Malik, from Ata, who said: If a man is in doubt regarding the circumambulation (tawaf) and does not know whether he has performed it or has not performed it, then he should restart it.
حدثنا أبو بكر قال حدثنا عبدة بن سليمان عن عبد الملك عن عطاء قال إذا شك الرجل في الطواف فلم يدر طاف أم لم يطف فليستقبل