It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he did not consider there to be any harm in contracting marriage while in the state of Ihram, and he said that the Prophet (peace and blessings be upon him) himself contracted marriage with Sayyidah Maymunah (may Allah be pleased with her) at a place called Sarf while in the state of Ihram. And after completing Hajj, when the Prophet (peace and blessings be upon him) set out to return, he reached the same place and spent the night with her.