Hazrat Muhammad ﷺ say (peace and blessings of Allah be upon him) said, I have been ordered to observe Eid on the Day of Sacrifice, which Allah has ordained for this Ummah. A companion requested, O Messenger of God! If I have only one maniha (i.e. she-camel taken from another) should I sacrifice it? Muhammad ﷺ say, No, but you should cut your hair, nails and mustache and clean the hair below the navel. This will be considered as your full sacrifice before Allah. -Sunan Abu Dawud, Hadith 2789; Sunan Nasa'i, Hadith 4365