1 – Muhammad b. `Ali b. al-Husayn by his isnad from Hisham b. Salim that he asked Abu `Abdillah عليه السلام about the surface which is urinated upon, and the sky comes in contact with it (i.e. it rains), so it trickles and contacts the garment. So he said: There is no harm with it, what contacted it from the water is more than it.

[358] 1 ـ محمّد بن علي بن الحسين بإسناده، عن هشام بن سالم أنه سأل أبا عبدالله ( عليه السلام ) عن السطح يبال عليه، فتصيبه السماء، فيكف ، فيصيب الثوب؟ فقال: لا بأس به، ما أصابه من الماء أكثرمنه.