Hadith.399 - Imam Jafar ibn Muhammad Al-Sadiq عليه السلام was asked about about who performed the washing (Ghusl) of (the body of) Sayyida Fatimah Al-Zahra {S.A}?"
Imam عليه السلام said: "The Commander of the Faithful Imam Ali ibn Abi Talib عليه السلام performed her washing because She was a ‘Al-Siddiqah’ (the most truthful and righteous one) ; and her ghusl is not permitted except by a ‘Al-Siddiq’ (truthful and righteous person)."