By the 13th century, some mosques even employed a professional astronomer, or muwaqqit, who helped worshippers pray in what they considered to be the proper manner.
وبحلول القرن الثالث عشر ،‏ وظَّفت بعض المساجد فلكيا محترفا ،‏ اي مؤقِّتا ،‏ يعين للعباد اوقات الصلوات الصحيحة .‏