In fact, the Jewish worshippers need to gather outside the city gates beside a river.
وَرُبَّمَا ٱلسَّبَبُ هُوَ عَدَمُ وُجُودِ عَشَرَةِ رِجَالٍ يَهُودٍ ،‏ ٱلْحَدِّ ٱلْأَدْنَى ٱلْمَطْلُوبِ لِتَأْسِيسِ مَجْمَعٍ .‏