Sayyiduna Abdullah bin Umar said: Taking a ritual bath (ghusl) on Friday is Sunnah.
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir. Its chain contains a narrator, Abu Bahr al-Bakrawi. Imam Ahmad said: People discarded his hadith. Some said: His hadith may be written down. Yahya bin Ma'in and others declared him da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 3054