Riyad as-Salihin, Book 2, Hadith 723 (In-Book) ⓘ
Umm 'Atiyyah (May Allah be pleased with her) reported: The Prophet instructed us at the time of washing the dead body of his daughter Zainab (May Allah be pleased with her) to begin with her right side, and from the parts that are washed in Wudu'.[Al-Bukhari and Muslim].
وعن أم عطية رضي الله عنها أن النبي صلى الله عليه وسلمى الله عليه وسلم ، قال لهن في غسل ابنته زينب رضي الله عنها : "ابدأن بميامنها ومواضع الوضوء منها" ((متفق عليه)) .