Mishkat al-Masabih 4 Prayer كتاب الصلاة 73

عَن أنس قَالَ: ذَكَرُوا النَّارَ وَالنَّاقُوسَ فَذَكَرُوا الْيَهُودَ وَالنَّصَارَى فَأُمِرَ بِلَالٌ أَنْ يَشْفَعَ الْأَذَانَ وَأَنْ يُوتِرَ الْإِقَامَةَ. قَالَ إِسْمَاعِيلُ: فَذَكَرْتُهُ لِأَيُّوبَ. فَقَالَ: إِلَّا الْإِقَامَة

Anas said they mentioned kindling fire and the use of a bell, and mentioned the Jews and the Christians. Then Bilal was ordered to repeat the call to prayer twice and the statement that the time for prayer had come ( al-iqama ) once. Isma’il 1 said that he mentioned it to Ayyub, 2 and he said it was correct except regarding the iqama . (Bukhari and Muslim.) 1. Bukhari ( Adhan , 3) gives a shorter form of the tradition than that above, mentioning Ismail b. Ibrahim in his isnad and telling how he made the enquiry of Ayyub. 2. Ayyub b. Abu Tamima.