Sahih Bukhari | Volume 1 | Hadith Number 821

Narrated by 'Aisha
Once Allah's Apostle delayed the 'Isha prayer till 'Umar informed him that the women and children had slept. Then Allah's Apostle came out and said: "None from amongst the dwellers of earth have prayed this prayer except you." In those days none but the people of Medina prayed.