(6) باب إِفْرَادِ الإِقَامَةِ
It was narrated that Anas said:
"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once." (ID)
Reference (ID): Sunan Ibn Majah 730 (ID)
In-book reference (ID): Book 3, Hadith 25 (ID)
English translation (ID): Vol. 1, Book 3, Hadith 730 (ID)