Zadhan (may Allah have mercy on him) said: A man asked Sayyiduna Ali (may Allah be pleased with him) about the ritual bath (ghusl), and he said: If you wish, bathe every day. He said: No, I am not asking about that bath. He said: Bathe on Friday, on the day of Arafah, and on the day of Eid al-Fitr and Eid al-Adha.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6124
(a) Nafi' narrates from Ibn Umar (may Allah be pleased with them both) that he used to take a ritual bath (ghusl) before going out for Eid al-Fitr.
(b) Nafi' said: He used to take a bath on Eid al-Adha and Eid al-Fitr.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6125
Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) used to take a ritual bath (ghusl) on the day of Eid al-Fitr and Eid al-Adha.
Its narrator Hajjaj bin Tamim is not strong, and Abu Ahmad (Ibn Adi) said: His narration is not sound.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6126