Al-Husayn ibn Sa‘id narrated from Fadalah, from Abd al-Rahman ibn Abi Abdillah al-Basri, who said:
I asked Imam عليه السلام about a woman who dies among men (non mahram). Imam عليه السلام said: "She should be wrapped and buried, and she should not be washed."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 467