15. A group has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from his brother Zur’ah from Sama‘ah who has said the following
“I once asked him (the Imam) (a.s.), about a man who is in wilderness and has no other clothes except one piece and has experienced sexual relation in it. He does not have water. What must he do? He (the Imam) said, ‘He takes Tayammum and performs Salah (prayer) in a sitting position and makes gestures.’”