Musnad Ahmad 31:634

Yunus narrated to us, Fulayh narrated to us, he said: I heard Abu Bakr ibn al-Munkadir, from Abu Sa’id al-Khudri, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Upon every person who has reached puberty is the ghusl (full ritual bath) on the day of Friday, and he should wear from his best clothes, and if he has perfume, he should touch some of it."