Sahih Al Bukhari Hadith Number 862

Narrated `Aisha: Once Allah’s Messenger (peace be upon him) delayed the `Isha’ prayer till `Umar informed him that the women and children had slept. Then Allah’s Messenger (peace be upon him) 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.

10  Call to Prayers (Adhaan)
Hadith number 862
Volume no 1
Chapter: 161 (The ablution for boys (youngsters). When they should perform Ghusl (take a bath) and Tuhur (purification). Their attendance at congregational prayers and their rows in the prayers.)