Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Prophet (peace and blessings be upon him) called the talbiyah for Umrah and his Companions for Hajj. He (peace and blessings be upon him) and those who had brought sacrificial animals did not come out of ihram, and the rest took off their ihram. Sayyiduna Talhah bin Ubaydullah (may Allah be pleased with him) was among those who had brought sacrificial animals, so he did not come out of ihram.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8860