Sayyidah Aishah (may Allah be pleased with her) narrates: The fasting of one performing Hajj al-Tamattu' is from when he enters the state of ihram for Hajj until the Day of Arafah. If he misses them, he should fast during the days of Mina.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8467