Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 3042
'A'isha (Allah be pleased with her) reported: We used to garland the goats and send them (to Mecca), and Allah's Messenger (may peace be upon him) stayed back in Medina as a non-Muhrim ard nothing was forbidden for him (which is forbidden for a Muhrim).