Hadith 8:2775
Abu Bakr narrated to us, he said: Yahya ibn Sa’id narrated to us, from ‘Amr, from al-Hasan, regarding a man who entered into the state of ihram for an ‘Umrah, then he arrived while the people were standing at ‘Arafah: If he knows that he will reach Makkah, he should go to it and complete his ‘Umrah. Otherwise, he should enter into the state of ihram for Hajj and perform two circumambulations (tawaf).
حدثنا أبو بكر قال نا يحيى بن سعيد عن عمرو عن الحسن في رجل أهل بعمرة فجاء والناس وقوف بعرفة إن علم أنه يدرك مكة أتاها فأهل من عمرته وإلا أهل بالحج وطاف طوافين