Ali ibn Ibrahim, from his father, from Hammad, from Hariz, from Zurarah, said: I said to Abu Ja‘far, peace be upon him: “A man came out of a ship naked, or his clothes were taken from him, and he did not find anything to pray in.” Imam عليه السلام said: "He should pray by signaling (with gestures), and if it is a woman, she should place her hand over her private part, and if it is a man, he should place his hand over his private part. Then they both should sit and perform prayer by gesturing, without bowing and without prostrating, so that what is behind them does not become exposed. Their prayer should be by gesturing with their heads." Imam عليه السلام said: "And if they are in water or in a deep sea, they should not prostrate upon it, and the requirement of facing the Qiblah is lifted from them in that situation. They should gesture therein, raising their heads counts as turning (toward Qiblah), and lowering them counts as turning (toward Qiblah)."