It is narrated from Sayyiduna al-Sa'b bin Jaththamah (may Allah be pleased with him) that he presented the Messenger of Allah (peace and blessings be upon him) with a wild donkey as a gift, and he (peace and blessings be upon him) returned it. When he (peace and blessings be upon him) saw this displeasure on his face, he said: "We only returned it to you because we are in the state of ihram."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7405