The ruling on one who dressed after sa'y and did not shorten his hair in 'Umrah

Question:
The questioner says: I am a pilgrim performing tamattu' Hajj with 'Umrah. I performed tawaf and sa'y, then I went out and dressed, but I did not shorten my hair or shave it due to ignorance. What is required of me?

Answer:
You are required to take off your garments, put on the izār, then wash, then put your garments back on, and praise be to Allah. If you have already entered the state of ihram for Hajj now, then you owe a sacrifice for that shortening. Shortening the hair is obligatory, and you must slaughter a sacrificial animal in Makkah for the poor. If you are unable to do so, then [you must fast] ten days. However, if you have not entered the state of ihram for Hajj until now, then wash, then enter the state of ihram for Hajj, and praise be to Allah. Perhaps that will suffice, perhaps it will suffice. We ask Allah for success and guidance for everyone, and may Allah send blessings and peace upon our Prophet Muhammad, his family, and his Companions.