Asma bint Abi Bakr (may Allah be pleased with them both) said: We set out in the state of ihram, and the Messenger of Allah (peace and blessings be upon him) said: "Whoever has a sacrificial animal with him should remain in his ihram, and whoever does not have a sacrificial animal should come out of ihram." I did not have a sacrificial animal, so I came out of ihram; and al-Zubayr (may Allah be pleased with him) had a sacrificial animal, so he did not come out of ihram. She said: I put on my clothes and went and sat beside al-Zubayr (may Allah be pleased with him). He said: Get up away from me. So I said: Are you afraid that I will leap upon you?
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8689