It is narrated from Sayyiduna Ya'la (may Allah be pleased with him) that he said: At al-Ji'ranah a man came to the Messenger of Allah (peace and blessings be upon him); he was wearing a cloak (jubbah), and his beard and head were dyed yellow. He said: "O Messenger of Allah, I have entered ihram, and my state is as you see." He (peace and blessings be upon him) said: "Wash this yellow off yourself and take off the cloak, and whatever you would do in your Hajj, do that in your Umrah."
Hadith Referenceالمعجم الكبير للطبراني / باب الياء / 18878