(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." (DE)
Reference (DE): Sunan Ibn Majah 730 (DE)
In-book reference (DE): Book 3, Hadith 25 (DE)
English translation (DE): Vol. 1, Book 3, Hadith 730 (DE)