وَعَنْ أَبِي مَحْذُورَةَ
أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَّمَهُ الْأَذَانَ تِسْعَ عَشْرَةَ كَلِمَةً وَالْإِقَامَةَ سَبْعَ عَشْرَةَ كَلِمَةً
The Prophet (sallallahu alayhi wa sallam) taught him the adhan as consisting of nineteen words, and the iqama as consisting of seventeen words. Ahmad, Tirmidhi, Abu Dawud, Nasai.