حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا حَمَّادُ بْنُ خَالِدٍ، عَنِ ابْنِ أَبِي ذِئْبٍ، عَنِ الزُّهْرِيِّ، بِإِسْنَادِهِ وَمَعْنَاهُ وَقَالَ بِإِقَامَةٍ إِقَامَةٍ جَمَعَ بَيْنَهُمَا . قَالَ أَحْمَدُ قَالَ وَكِيعٌ صَلَّى كُلَّ صَلاَةٍ بِإِقَامَةٍ .
The aforesaid tradition has been transmitted by Al Zuhri through a different chain of narrators. This version adds "Each prayer with an iqamah" . Ahmad reported on the authority of Waki' "he offered each prayer with a single iqamah."
Reference: Sunan Abi Dawud 1927
In-book : Book 11, Hadith 207
English translation : Book 10, Hadith 1922