lxxviii Glossary : dates, some other food-stuff, or gold and silver.  Islam strictly prohibits any kind of usury. Rida : A sheet that is worn round the upper part of the body. Rikaz : Buried wealth from the pre-Islamic Period. Sa' : A measure that equals four Mudds i.e. 3 Kgrms (App). (As-) Saba : Easterly winds Sa'dan : A thorny plant suitable for grazing camels. Sadaqa : Anything given in charity. Safa and Marwa : Two mountains at Mecca neighbouring Al-Haram (the Great Mosque) to the east.  One who performs 'Umra or Hajj should walk seven times between the two places and that is called "Sa'i". Sahba' : A place near Khaiber. Sahu : Forgetting (here it means forgetting how many Rak'at a person has prayed in which case he should perform two prostrations of Sahu). (As-) Sajda : A Sura by the recitation of which prostration becomes essential when certain verses are read. Sariya : A small army unit sent by the Prophet for Jihad, without his participation in it. Sarif : A place six miles away from Mecca. Sawiq : A kind of mash made of powdered roasted wheat or barley grain (also with sugar and dates). Sham : The region comprising Syria, Palestine, Lebanon and Jordan. (Ash-) Shajara : A well-known place on the way from Medina to Mecca. Shawwal : The 10th month in the Muslim calendar. Shirk : To worship others along with Allah.  See Introduction. Sidr : Lotus tree. Sidrat-ul-Muntaha : A tree over the seventh heaven near the Paradise. Sila : A well-known mountain in Medina (As-) Sirat : Sirat: originally means 'a road'.  It also means the bridge that is laid across Hell-Fire for the people to pass on the day of Judgement.  It is described as sharper than a sword and thinner than a hair, it will have hooks over it to snatch the people. Siwak : A piece of a branch or a root of a tree called Al-Arak used as a toothbrush. Subhan-Allah : To honour Allah from all what (unsuitable things) is ascribed to Him.